libriform,a.Bot.|ˈlaɪbrɪfɔːm| [f. L. libr-, liber bark: see -form.] Of the nature or character of liber. 1877Bennett tr.Thomé's Bot. 364 Simple bast-like wood-fibres, or libriform fibres.1885G. L. Goodale Physiol.Bot. (1892) 81 Libriform cells are variable in length in different plants.