(ichthyology) Small non-retractable fins, generally on the caudal peduncle between the last dorsal or anal fin and the caudal fin of some fishes. In some groups, such as tuna, finlets are rayless.

simple past tense and past participle of talk

(anatomy) Of, relating to, or being a cricoid cartilage.

(chemistry) A heterocyclic compound containing a diazepine ring fused to thiophene and triazole rings, and forming the central core of several pharmaceutical drugs.