▪ I.† myseObs. [Form and origin doubtful.] Applied to the ‘lice’ (Vulg.sciniphes, LXX. σκνῖϕες) of the third plague of Egypt. c1440York Myst. xi. 273 Lorde, grete myses bothe morn and none Bytis vs full bittirlye.[c1460Towneley Myst. viii. 286 Greatte mystis.] ▪ II.myse obs.pl. mouse n.