Occurring every three hundred (300) years.

(nonstandard) A triceps.

(anatomy) Any muscle having three heads. / (anatomy) Specifically, the triceps brachii.

(Christianity, in the Greek Orthodox church) A candlestick with three lights, signifying the trinity.

The triceps in the upper arm.

The highest rank and pay grade for prefectures in Ancient Rome / A person in their thirties, a person aged between 30 and 39 years (inclusive).

plural of tricenarian

(obsolete) Of or pertaining to the number thirty

A series of Roman Catholic masses said on thirty successive days

plural of tricerion