mitc
04
qumc

O.S. is the abbreviation for:
left eye
Correct. O.S. is the abbreviation for left eye.
right eye
Incorrect. O.D. is the abbreviation for right eye.
both eyes
Incorrect. O.U. is the abbreviation for both eyes.

The abbreviation t.i.d. means:
three times a day
Correct. The abbreviation t.i.d. means three times a day.
daily
Incorrect. The abbreviation q.d. means daily.
twice a day
Incorrect. The abbreviation b.i.d. means twice a day.

Arthr/o is the combining form for:
joint
Correct. Arthr/o is the combining form for joint.
artery
Incorrect. Arteri/o is the combining form for artery.
armpit
Incorrect. Axill/o is the combining form for armpit.

Thorac/o is the combining form for:
chest
Correct. Thorac/o is the combining form for chest.
windpipe, trachea
Incorrect. Trache/o is the combining form for windpipe, trachea.
nerve
Incorrect. Neur/o is the combining form for nerve.

Gastr/o is the combining form for:
stomach
Correct. Gastr/o is the combining form for stomach.
liver
Incorrect. Hepat/o is the combining form for liver.
spleen
Incorrect. Splen/o is the combining form for spleen.

