microcosm us (mikrokozmus)

[LL. (in defs. 2 and 3, NL.), microcoustic (mī-krō-kösʼtik), a. and n. [Irreg. 3749 hearing: see acoustic.] I. a. Serving to augment weak sounds; of or pertaining to an instrument for augmenting weak sounds. II. n. An aural instrument designed to collect and augment small sounds, for the purpose of a isting the partially deaf in hearing.