NATATORIOUS
Na`ta*to"ri*ous, a. (Zoöl.)

Defn: Adapted for swimming; — said of the legs of certain insects.

NATATORIUM
Na`ta*to"rium, n. Etym: [L.]

Defn: A swimming bath.

NATATORY
Na"ta*to*ry, a. Etym: [L. natatorius.]

Defn: Adapted for swimming or floating; as, natatory organs.

NATCH Natch, n. Etym: [OF. nache fesse, LL. natica, from L. natis the rump, buttocks. Cf. Aitchbone.]

Defn: The rump of beef; esp., the lower and back part of the rump.
Natch bone, the edgebone, or aitchbone, in beef.

NATCHEZ
Natch"ez, n. pl. (Ethnol.)

Defn: A tribe of Indians who formerly lived near the site of the city of Natchez, Mississippi. In 1729 they were subdued by the French; the survivors joined the Creek Confederacy.