NAPHTHYL
Naph"thyl, n. Etym: [Naphthalene + -yl.] (Chem.)
Defn: A hydrocarbon radical regarded as the essential residue of naphthalene.
NAPHTHYLAMINE
Naph`thyl*am"ine, n. (Chem.)
Defn: One of two basic amido derivatives of naphthalene, C10H7.NH2, forming crystalline solids.
NAPIERIAN; NAPERIAN
Na*pie"ri*an, Na*pe"ri*an ,, a.
Defn: Of, pertaining to, or discovered by, Napier, or Naper. Naperian logarithms. See under Logarithms.
NAPIER'S BONES; NAPIER'S RODS
Na"pi*er's bones`, Na"pi*er's rods`.
Defn: A set of rods, made of bone or other material, each divided into nine spaces, and containing the numbers of a column of the multiplication table; — a contrivance of Baron Napier, the inventor of logarithms, for facilitating the operations of multiplication and division.
NAPIFORM
Na"pi*form, a. Etym: [L. napus turnip + -form: cf. F. napiforme. Cf.
Navew.] (Bot.)
Defn: Turnip-shaped; large and round in the upper part, and very slender below.