naphazoline
— Noun
– English
~ vasoconstrictor (trade names Privine and Sudafed) used in nasal sprays to treat symptoms of nasal congestion and in eyedrops to treat eye irritation
naphtha
— Noun
– English
~ any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents
naphthalene
— Noun
– English
~ a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs
naphthol
— Noun
– English
~ either of two phenols derived from naphthalene
naphthoquinone
— Noun
– English
~ a fat-soluble vitamin that helps in the clotting of blood
Napier
— Noun
– English
~ Scottish mathematician who invented logarithms; introduced the use of the decimal point in writing numbers (1550-1617)
Napier's bones
— Noun
– English
~ a set of graduated rods formerly used to do multiplication and division by a method invented by John Napier