[hy.a.line] adj [LL hyalinus, fr. Gk hyalinos, fr. hyalos] (ca. 1661): transparent or nearly so and usu. homogeneous
[2]hy.a.line n (1667) 1: something (as the clear atmosphere) that is transparent
2. or hy.a.lin : any of several translucent nitrogenous substances related to chitin, found esp. around cells, and readily stained by eosin