1) Atropine 1) Drug 2) Mydriatic drug 3) Used to aid eye examinations 
• (n.) A mydriatic medicine or agent, as belladonna. • (a.) Causing dilatation of the pupil.
1. dilating the pupil. 2. any drug that dilates the pupil.
Dilates the pupil.
1. <ophthalmology> Dilating the pupil. ... 2. <pharmacology> Any drug that dilates the pupil. ... (18 Nov 1997) ... 
(mid″re-at´ik) dilating the pupil. a drug that dilates the pupil.
Myd`ri·at'ic adjective Causing dilatation of the pupil. -- noun A mydriatic medicine or agent, as belladonna. 
Type: Term Pronunciation: mid′rē-at′ik Definitions: 1. Causing mydriasis or dilation of the pupil. 2. An agent that dilates the pupil.
Any ophthalmic medication that dilates the pupil.
[n] - a drug that causes the pupil of the eye to dilate
mydriatic A medicine that causes dilation of the pupil in the eye.
a drug that causes the pupil to dilate (widen) 
mydriatic drug noun a drug that causes the pupil of the eye to dilate; used to aid eye examinations
pertaining to or producing mydriasis.