nəˈvakyəˌlīt noun
( -s )
Etymology: Latin novacula razor (from — assumed — Latin novare to shave, whet + Latin -cula, suffix denoting an instrument) + English -ite; akin to Sanskrit kṣṇauti he whets, Old Norse snöggr shorn, bald, Old English besnythian to deprive, Middle High German snœde contemptible, Old Norse snauthr bereft, poor, Old English -heord hair of a woman's head — more at hurds
: a very hard fine-grained siliceous rock used for whetstones and thought to be of sedimentary origin