"new, strange, unusual, previously unknown," mid-15c., but little used before 1600, from Old French novel, nouvel "new, young, fresh, recent; additional; early, soon" (Modern French nouveau, fem. nouvelle), from Latin novellus "new, young, recent," diminutive of novus "new" (see new).
1650s, transitive, "cause to produce an unusual or excess secretion of saliva" (implied in salivating); intransitive sense "produce an abnormally abundant flow of saliva" is from 1660s, from Latin salivatus, past participle of salivare, from saliva (see saliva). Figurative use in reference to anticipation is by 1951. Related: Salivated.
"small, tailed, salamander-like amphibian," early 15c., neute, newte, a misdivision of an ewte (see N for other examples), a variation of Middle English evete (see eft). "Eft, though now only provincial, is strictly the correct form" [Century Dictionary]. OED notes that "the change of v to w is unusual."
"one mad for books, an enthusiastic collector of rare or unusual books," 1811; see bibliomania. Earlier was bibliomane (1777), from French.
A bibliomaniac must be carefully distinguished from a bibliophile. The latter has not yet freed himself from the idea that books are meant to be read. [Walsh]
early 15c., rarite, "thinness, porosity, condition of being not dence;" 1550s, "fewness, state of being uncommon," from French rarité and directly from Latin raritas "thinness, looseness of texture; fewness," from rarus (see rare (adj.1)). Sense of "a rare thing or event, thing valued for its scarcity or unusual excellence" is from 1590s.