4. (Bot.) Any plant of the order Naiadaceæ, such as eelgrass, pondweed,
etc.
Na"iant (?), a. (Her.) See Natant. Crabb.
Na"id (?), n. [See Naiad.] (Zoöl.) Any one of numerous species of
small, fresh- water, chætopod annelids of the tribe Naidina. They
belong to the Oligochæta.
Na"ïf` (&?;; formerly &?;), a. [F. naïf. See Naïve.] 1. Having a true
natural luster without being cut; -- applied by jewelers to a precious
stone.