Root Word Dictionary – A

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Edited by Eugene M. McCarthy, PhD      

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Root Word Dictionary is the most comprehensive online dictionary providing meanings for the Greek and Latin root words used in constructing biological and medical terminology. It defines more biomedical roots than any other online source. For more details about how to use this dictionary, click here.

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       Greek Roots:
 Latin Roots:
     

   adenGland.

   adeps, adipis — Fat, grease; fatty tissue.

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   aetia — Cause.

   aetos — Eagle.

   agogos — Leading.

   agra — Seizure.

   aima — Blood.

   aisthesis — Sensation, feeling.

   akantha — Thorn.

   akariMite.

   akouein — To hear.

   akris — Grasshopper.

   akromionAcromion.

   akros — Uppermost.

   aktis — Ray.

   algesia — Sense of pain.

   amethystos — Amethyst.

   amnionAmnion.

   ampelos — Grapevine.

   amphoos — Around, on both sides.

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   amphoreus — Amphora.

   andros — Man.

   anem — Wind.

   angos — Vessel.

   ankylos — Bent; fused.

   anthax — Coal, carbuncle.

   anthos — Flower.

   anthropos — Human.

   anti — Against.

   aplanes — Fixed.

   apo — Away from, off.

   arachne — Spider.

   arche — Beginning.

   archein — To rule.

   archosAnus.

   arktos — Bear (the animal).

   arteriaArtery.

   arthron — Joint.

   askos — Bag.

   aster — Star.

   asthenes — Weak.

   atelos — Imperfect, defective.

   attikos — Upper part.

   autos — Same, self.

   auxeine — To increase.

   axon — Axle, axis, vertebra.

   ab — Departing from.

   abavus — Great-great-grandfather.

   abbatia, abbatiae — Abbey, monastery.

   abdomenAbdomen.

   aberrare — Wander, deviate.

   abicere — Cast down, throw away.

   abluere — Wash away, purify.

   accipere — Accept, receive.

   accipiter, accipitris — Hawk.

   acetum, aceti — Vinegar, sour wine.

   acerbitas, acerbitatis — Harshness, severity.

   acicula, aciculae — Small pin.

   acidus, -a, -um — Sour.

   acipenser, acipenseris — Sturgeon.

   aculeus, aculei — Sting, spine, thorn, point, spike.

   acumen, acuminis — Sharp point; spur; sting; peak.

   acus, acus — Needle, pin.

   acutus, -a, -um — Sharp, pointed; severe; acute.

   ad — To, up to, towards; near, at; on.

   adducere — To lead to, bring to.

   adjungere — To add, attach.

   adjuvare — To help, aid.

   aequus — Level, even, equal, like.

   aer, aeris — Air, atmosphere, sky.

   ager, agri — Field, farm.

   albus, -a-, -um — White, pale, fair, gray; bright, clear.

   alius — Other, another; different, changed.

   allium, alli(i) — Garlic.

   allucinari — To prate, dream, or imagine.

   ambo — Both.

   ambulare — To walk, move about.

   amplecti — Surround, encircle, embrace, clasp.

   ampliare — Enlarge, augment, widen.

   ampulla, ampullae — Bottle, jar.

   amygdalum, amygdali — Almond; tonsil.

   amylum, amyli — Starch.

   ante — In front, in view; before, facing.

   anus, aniAnus.

   apes, apis — Bee.

   apex, apicis — Point, top, summit; cap, crown.

   arbor, arboris — Tree.

   argilla, argillae — Clay.

   ater, atra -um — Black, dark.

   atrium, atri(i) — Main room or chamber.

   auris, auris — Ear.

   aurum, auri — Gold.

   australis, australis, australe — Southern.

   avis, avis — Bird.

   axilla, axillae — Armpit.



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