Medical prefixes for medical assistants

80 medical prefixes for medical assistants, with plain definitions and sources.

• a-, an-Without, not, or lacking.
• ab-Away from.
• ad-Toward or near.
• ambi-Both or both sides.
• ante-Before or in front of.
• anti-Against or opposing.
• auto-Self.
• bi-Two or twice.
• bio-Life or living tissue.
• brady-Slow.
• cata-Down or breaking down.
• circum-Around.
• con-With or together.
• contra-Against or opposite.
• de-Away from, removal, or loss of.
• dextro-Right or right side.
• dia-Through, across, or apart.
• diplo-Double or twofold.
• dis-Apart, separation, or reversal.
• dys-Difficult, painful, or abnormal.
• ecto-, exo-Outside or outer.
• ef-Out of or away from.
• en-In or inside.
• endo-Within or inner.
• epi-Upon, over, or on top of.
• eu-Good, normal, or well.
• ex-Out of, away from, or beyond.
• extra-Outside of or beyond.
• hemi-Half or one side.
• hetero-Other or different.
• homeo-Similar, same, or unchanging.
• homo-Same or alike.
• hyper-Above normal, excessive, or beyond.
• hypo-Below normal, under, or deficient.
• idio-One's own, individual, or unknown in origin.
• in-, im-Not; in some words, in or into.
• infra-Below or beneath.
• inter-Between.
• intra-Within or inside.
• iso-Equal or the same.
• juxta-Near or next to.
• macro-Large.
• mal-Bad, poor, or abnormal.
• mega-, megalo-Large or great.
• meso-Middle.
• meta-Change, after, or beyond.
• micro-Small.
• mono-One or single.
• multi-Many.
• neo-New.
• non-Not or without.
• normo-Normal.
• nulli-None.
• oligo-Few, scanty, or too little.
• ortho-Straight, upright, normal, or correct.
• oxy-Oxygen; also sharp or quick.
• pan-All or everywhere.
• para-Beside, near, or abnormal.
• per-Through.
• peri-Around or surrounding.
• poly-Many, much, or excessive.
• post-After or behind.
• pre-Before or in front of.
• primi-First.
• pro-Before or forward; also favoring.
• pseudo-False.
• quadri-Four.
• re-Again or back.
• retro-Backward or behind.
• semi-Half or partly.
• sinistro-Left or left side.
• sub-Under or below.
• super-Above, over, or excessive.
• supra-Above or over.
• syn-, sym-Together or joined.
• tachy-Fast or rapid.
• tetra-Four.
• trans-Across or through.
• tri-Three.
• uni-One.