Medical Terminology Prefixes A-M

A, B & Cs

100

Two

Bi-

200

Brain

Cerebro-

300

Against, Opposed to

Anti-

400

Self

Auto-

500

Against, Opposite

Contra-

A, B & Cs

100

Around, About

Circum-

200

Without, Lack of

A-

300

Before

Ante-

400

Slow

Brady-

500

Away From

Ab-

A, D, E & H

100

To, Toward

Ad-

200

Difficult, Painful

Dys-

300

Upon, On

Epi-

400

Under, Deficient

Hypo-

500

Through, Complete

Dia-

E, H & I

100

Red

Erythro-

200

Over, Excessive

Hyper-

300

Within

Endo-

400

Half

Hemi-

500

Within

Intra-

I & M

100

Between

Inter-

200

One

Mono-

300

Large (Two Answers)

Macro- & Mega-

400

Bad, Abnormal

Mal-

500

Black

Melan-