nymphet

• nymphette

From nymph +‎ -et (“diminutive”), first attested 1612. The second sense was popularized by Vladimir Nabokov's 1955 novel Lolita.

nymphet (plural nymphets)

1. (obsolete) A small nymph. [17th-19th c.]
   • 1612 Michael Drayton, Poly-Olbion I. xi. Argt. 171:

     Of the nymphets sporting there In Wyrrall, and in Delamere.

2. A sexually attractive girl or young woman. [from 20th c.]

More common than the alternative spelling nymphette, which uses the more standard feminine suffix -ette.

• jailbait, lolita, nymph

• The changing English language, Brian Foster, 1968, pp. 185–186 – on spelling nymphet versus nymphette