A calcineurin inhibitor used as an immunosuppressant medication.

(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.

(obsolete) fatuity

A splendid display of something. / (by extension, historical) A collection or display of weaponry. / Ceremonial garments, complete with all accessories. / (historical) A complete set of armour.