fen

fen [Ar. fann = class, category] , ‘fen’ (term applied to the larger divisions of Avicenna’s Canon). dicit in 4° canone in fen vij decoracionis Bacon IX 4 (cf. ib. 47: in fen decoracionis); ponit Avicenna prima fen tercii libri tracta 2 cap. 2 Gad. 50. 2.