Alternative form of three of a kind

(mycology) Any member of the kingdom Fungi; a eukaryotic organism typically having chitin cell walls but no chlorophyll or plastids. Fungi may be unicellular or multicellular.

(biochemistry) Any of several classes of enzyme that remove acetyl groups from proteins

(computing) A space-partitioning data structure for organizing points in a k-dimensional space, used in search algorithms etc.