Herbarium \Her*ba"ri*um\, n.; pl. E. {Herbariums}, L. {Herbaria}. [LL., fr. L. herba. See {Herb}, and cf. {Arbor}, {Herbary}.] 1. A collection of dried specimens of plants, systematically arranged. --Gray. [1913 Webster] 2. A book or case for preserving dried plants. [1913 Webster]