Prefixes: Position And Direction

Front 1

Ab-

Back 1

Away from;

Abduction

Front 2

Ad-

Back 2

Toward;

Adduction, addiction

Front 3

Ante-

Pre-

Back 3

Before in time or in place;

Anteroom (an outer room generally entered before a more important room); prerenal (pertains to the area in front of - before in place - the kidney)

Front 4

Circum-

Peri-

Back 4

Around;

Perimeter, circumference

Front 5

Contra-

Back 5

Against, opposed;

Contralateral (affecting the opposite side)

Front 6

Dia-

Back 6

Through;

Diameter (passes through the center of a circle)

Front 7

Ecto-

Ex-

Exo-

Extra-

Back 7

Outside, without, away from;

Export, exoskeleton, extranuclear

Front 8

En-

End-

Endo-

Back 8

Inside;

Enclose (to close up inside something); endotracheal (within the trachea)

Front 9

Epi-

Back 9

Above, on;

Epitaph

Front 10

Hypo-

Infra-

Sub-

Back 10

Beneath, under;

Hypodermic (pertaining to the area below the skin); subcutaneous (below the skin layer)

Front 11

inter-

Back 11

Between;

interval (space of time between events)

Front 12

intra-

Back 12

within;

intracollegiate (within the members of a college); intramuscular, intravenous, intradermal

Front 13

ipsi-

Back 13

same;

ipsilateral (same side)

Front 14

meso-

mid-

Back 14

middle;

mesoderm (middle of three tissue layers that form during the development of an embryo)

Front 15

para-

Back 15

near, beside, or abnormal;

parallel (beside each other)

Front 16

per-

Back 16

through, by;

perspire (to excrete fluid through pores of the skin); permeable (allowing substances to pass through)

Front 17

post-

Back 17

after, behind;

postdate, postnasal (behind the nose)

Front 18

retro-

Back 18

behind, backward

retroactive (extending back to a prior time or condition), retrospection (looking backward in time)

Front 19

super-

supra-

Back 19

above, beyond;

superficial, suprarenal

Front 20

sym-

syn-

Back 20

joined, together;

syndrome (set of symptoms); symbiosis (two organisms of different species benefically coexist)

Front 21

trans-

Back 21

across;

transdermal drug ( can be absorbed through unbroken skin)