Common medical terminology.Medical Terminology Reference word building - root word prefix and suffix.  Medical terms dictionary
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Medical Terminology Reference

Word building  [ E ]

Use this reference to see how common medical terms are created using the various prefixes, suffixes, and root words.

Alphabetical Listing  (word building)

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ectoblast

Prefix: ecto-
Prefix Definition: out; outside
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -blast
Suffix Definition: embryonic; immature cell
Definition: outer layer of an immature cell

ectoderm

Prefix: ecto-
Prefix Definition: out; outside
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -derm
Suffix Definition: skin
Definition: outermost layer of skin cells

ectopia

Prefix: ecto-
Prefix Definition: out; outside
1st Root Word: top/o
1st Root Definition: place; position; location
2nd Root Word:
2nd Root Word Definition:
Suffix: -ia
Suffix Definition: condition
Definition: condition of an abnormal location or position of an organ or
body part

ectopic pregnancy

Prefix: ecto-
Prefix Definition: out; outside
1st Root Word: top/o
1st Root Definition: place; position; location
2nd Root Word:
2nd Root Word Definition:
Suffix: -ic
Suffix Definition: pertaining to
Definition: fetus develops outside the uterus

ectoplasm

Prefix: ecto-
Prefix Definition: out; outside
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -plasm
Suffix Definition: formation; structure
Definition: outer layer of a cell

electrocardiogram

Prefix:
Prefix Definition:
1st Root Word: electr/o
1st Root Definition: electricity
2nd Root Word: cardi/o
2nd Root Word Definition: heart
Suffix: -gram
Suffix Definition: record
Definition: a record of electrical currents associated with the heart muscle

electrocardiograph

Prefix:
Prefix Definition:
1st Root Word: electr/o
1st Root Definition: electricity
2nd Root Word: cardi/o
2nd Root Word Definition: heart
Suffix: -graph
Suffix Definition: instrument for recording
Definition: instrument for recording electrical currents associated with
the heart muscle

encephalitis

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word:
2nd Root Word Definition:
Suffix: -itis
Suffix Definition: inflammation
Definition: inflammation of the brain

encephalocele

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word:
2nd Root Word Definition:
Suffix: -cele
Suffix Definition: hernia; swelling
Definition: hernia protrusion of brain substance

encephalogram

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word:
2nd Root Word Definition:
Suffix: -gram
Suffix Definition: record
Definition: record of electrical activity of the brain

encephalomalacia

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word:
2nd Root Word Definition:
Suffix: -malacia
Suffix Definition: softening
Definition: softening of brain tissue

encephalomeningitis

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word: mening/o
2nd Root Word Definition: meninges (membranes covering the spinal cord
and brain)
Suffix: -itis
Suffix Definition: inflammation
Definition: inflammation of the brain and meninges (membranes covering
the spinal cord and brain)

encephalomyelitis

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word: myel/o
2nd Root Word Definition: spinal cord; bone marrow
Suffix: -itis
Suffix Definition: inflammation
Definition: inflammation of the brain and spinal cord

encephalopathy

Prefix:
Prefix Definition:
1st Root Word: encephal/o
1st Root Definition: brain
2nd Root Word:
2nd Root Word Definition:
Suffix: -pathy
Suffix Definition: disease; emotion
Definition: disease of function of the brain is affected

endocrine

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -crine
Suffix Definition: secrete; separate
Definition: glands that secrete products into the blood

endocrinology

Prefix: endo-
Prefix Definition: in; within
1st Root Word: crin/o
1st Root Definition: secrete
2nd Root Word:
2nd Root Word Definition:
Suffix: -logy
Suffix Definition: study (process of)
Definition: study of glands that secrete products into the blood

endocytosis

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -cytosis
Suffix Definition: condition of cells; slight increase of numbers
Definition: cells absorb material outside their membranes

endogen

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -gen
Suffix Definition: substance that produces
Definition: substance (plant) that increases in size by internal growth

endoscope

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -scope
Suffix Definition: instrument for visual examination
Definition: instrument for visual examination in the body or its internal parts

endoscopy

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -scopy
Suffix Definition: visual examination
Definition: visual examination inside the body

endospore

Prefix: endo-
Prefix Definition: in; within
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -spore
Suffix Definition: reproductive element
Definition: asexual spore developed within a cell

endothermic

Prefix: endo-
Prefix Definition: in; within
1st Root Word: therm/o
1st Root Definition: heat
2nd Root Word:
2nd Root Word Definition:
Suffix: -ic
Suffix Definition: pertaining to
Definition: pertaining to absorption of heat or an organism that
generates heat

enterolysis

Prefix:
Prefix Definition:
1st Root Word: enter/o
1st Root Definition: intestines (usually small intestines)
2nd Root Word:
2nd Root Word Definition:
Suffix: -lysis
Suffix Definition: breakdown; separation; destruction; loosening
Definition: separation of intestinal adhesions

epicardium

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word: cardi/o
1st Root Definition: heart
2nd Root Word:
2nd Root Word Definition:
Suffix: -ium
Suffix Definition: structure; tissue
Definition: serous membrane that forms the innermost layer of the
pericardium and the outer surface of the heart

epidermis

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word: derm/o
1st Root Definition: skin
2nd Root Word:
2nd Root Word Definition:
Suffix:
Suffix Definition:
Definition: outer layer of the skin

epidural

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word: dur/o
1st Root Definition: dura matter
2nd Root Word:
2nd Root Word Definition:
Suffix: -al
Suffix Definition: pertaining to
Definition: pertaining to being on or around the dura matter

epilepsy

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -lepsy
Suffix Definition: seizure
Definition: unprovoked seizure

episclera

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word: scler/o
1st Root Definition: sclera (white of the eye)
2nd Root Word:
2nd Root Word Definition:
Suffix:
Suffix Definition:
Definition: outermost layer of the sclera

episiotomy

Prefix:
Prefix Definition:
1st Root Word: episi/o
1st Root Definition: vulva
2nd Root Word:
2nd Root Word Definition:
Suffix: -tomy
Suffix Definition: process of surgically cutting the opening of the vagina
Definition:

epistaxis

Prefix: epi-
Prefix Definition: above; upon; on
1st Root Word:
1st Root Definition:
2nd Root Word:
2nd Root Word Definition:
Suffix: -staxis
Suffix Definition: dripping; trickling
Definition: dripping; trickling; blood from the nose

erythrocyte

Prefix:
Prefix Definition:
1st Root Word: erythr/o
1st Root Definition: red
2nd Root Word:
2nd Root Word Definition:
Suffix: -cyte
Suffix Definition: cell
Definition: red blood cell

erythromelalgia

Prefix:
Prefix Definition:
1st Root Word: erythr/o
1st Root Definition: red
2nd Root Word: mel/o
2nd Root Word Definition: limb; limbs
Suffix: -algia
Suffix Definition: pain
Definition: condition of redness, swelling and/or pain of the limbs

esophageal

Prefix:
Prefix Definition:
1st Root Word: esophag/o
1st Root Definition: esophagus
2nd Root Word:
2nd Root Word Definition:
Suffix: -eal
Suffix Definition: pertaining to
Definition: pertaining to the esophagus

esthesia

Prefix:
Prefix Definition:
1st Root Word: esthes/o
1st Root Definition: nervous sensation
2nd Root Word:
2nd Root Word Definition:
Suffix: -ia
Suffix Definition: condition
Definition: condition of sensation and feeling sensibility

estrogen

Prefix:
Prefix Definition:
1st Root Word: estr/o
1st Root Definition: female
2nd Root Word:
2nd Root Word Definition:
Suffix: -gen
Suffix Definition: substance that produces
Definition: female steroid hormone produced by the ovaries

eukaryote

Prefix: du-
Prefix Definition: good; normal
1st Root Word: kary/o
1st Root Definition: nucleus
2nd Root Word:
2nd Root Word Definition:
Suffix: -ote
Suffix Definition: expand
Definition: cell with a true nucleus

excision

Prefix: ex-
Prefix Definition: out; away from
1st Root Word: cis/o
1st Root Definition: to cut
2nd Root Word:
2nd Root Word Definition:
Suffix: -ion
Suffix Definition: process
Definition: process of cutting out; away from

exophthalmos

Prefix: exo-
Prefix Definition: out; away from
1st Root Word: thalm/o
1st Root Definition: thalamus (eyeball)
2nd Root Word:
2nd Root Word Definition:
Suffix:
Suffix Definition: abnormal protrusion of the thalamus (eyeball)
Definition:

exoskeleton

Prefix: exo-
Prefix Definition: out; away from
1st Root Word: skelet/o
1st Root Definition: skeleton
2nd Root Word:
2nd Root Word Definition:
Suffix:
Suffix Definition:
Definition: external hard, protective covering on an animal

extradural

Prefix: extra-
Prefix Definition: outside
1st Root Word: dur/o
1st Root Definition: dura matter
2nd Root Word:
2nd Root Word Definition:
Suffix: -al
Suffix Definition: pertaining to
Definition: pertaining to the outside of dura matter, but within the skull
 
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