nymphet[nim′fət, nim fet′]
a pubescent girl, esp. one who is sexually precocious
Origin of nymphetFrench nymphette, diminutive of nymphe: see nymph
A pubescent girl regarded as sexually precocious.
Origin of nymphetFrom earlier nymphet, nymphette, small nymph, young nymph (applied in Vladimir Nabokov's novel Lolita (1955) to a pubescent girl desired by the novel's narrator) : nymph + –et.
More common than the alternative spelling nymphette, which uses the more standard feminine suffix -ette.
nymph +"Ž -et (“diminutive"), attested 1612.