Medical Prefixes and Suffixes: Quantities, Positions, Negation, and Direction

What does the prefix 'ultra-' mean?

extreme

When do you use 'a-' versus 'an-'?

Use 'a-' before a consonant and 'an-' before a vowel or the letter h.

What does the prefix 'mono-' mean?

1

What does the prefix 'bi-' mean?

2

What does the prefix 'tri-' mean?

3

What does the prefix 'di-' mean?

double

What does the prefix 'centi-' mean?

hundredth

What does the prefix 'milli-' mean?

thousandth

What does the prefix 'semi-' mean?

half

What does the prefix 'macro-' mean?

large

What does the prefix 'micro-' mean?

small

What does the prefix 'ante-' mean?

before

What does the prefix 'post-' mean?

after

What does the prefix 'ana-' mean?

upward or again.

What does the prefix 'anti-' mean?

against.

What does the prefix 'brady-' mean?

slow

What does the prefix 'tachy-' mean?

fast.

What does the prefix 'dys-' mean?

bad

What does the prefix 'mal-' mean?

bad

What does the prefix 'eu-' mean?

good

What does the prefix 'pro-' mean?

supporting

What does the prefix 'in-' mean?

not or inside.

What is the difference between 'in-' (not) and 'in-' (inside)?

In- (not) indicates negation, while in- (inside) indicates location.

What does the prefix 'infra-' mean?

under

What does the prefix 'intra-' mean?

within.