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timolol Syllabification: tim·o·lol
Pronunciation: /ˈtīməˌlôl/ /-ˌläl/

Definition of timolol in English:


A synthetic compound that acts as a beta blocker and is used to treat hypertension, migraines, and glaucoma.
  • Chemical formula: C13H24N4O3S
Example sentences
  • The beta-blocker medication timolol may have significant cardiac side effects, including bradycardia and heart failure.
  • The beta blockers, including propranolol, nadolol, atenolol, metoprolol, and timolol, are effective but may cause fatigue, sleep disorders, and decreased exercise tolerance.
  • One researcher found topical use of the betablocker, timolol, did not work as well in the evening.


1970s: from tim- (of unknown origin) + (propran)olol.

Definition of timolol in:
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