nympholepsy (n.)

late 14c., nimphe, "one of a class of semi-divine female beings in classical mythology," imagined as beautiful maidens, eternally young, from Old French nimphe (13c.) and directly from Latin nympha "nymph, demi-goddess; bride, mistress, young woman," from Greek nymphē "bride, young wife," later "beautiful young woman," then "semi-divine being in the form of a beautiful maiden;" usually said to be related to Latin nubere "to marry, wed" (see nuptial), but Beekes suggests a Pre-Greek origin.

Sub-groups include dryads, hamadryads, naiads, nereids, and oreads. The sense in English of "young and attractive woman" is attested from 1580s. Meaning "insect stage between larva and adult" is recorded from 1570s. Related: Nymphal; nymphean.

1570s, from French epilepsie (16c.), from Late Latin epilepsia, from Greek epilepsis "epilepsy," literally "a seizure," from epilambanein "to lay hold of, seize upon, attack," especially of diseases, but also of events, armies, etc., from epi "upon" (see epi-) + lepsis "seizure," from leps-, future stem of lambanein "take hold of, grasp" (see lemma).

Earlier was epilencie (late 14c.), from French epilence, a variant form influenced by pestilence. The native name in English was falling sickness (Old English fylleseoc, glossing epilepsia).

"morbid and uncontrollable sexual desire in women," 1775, in English translation of "Nymphomania, or a Dissertation Concerning the Furor Uterinus" (1771) by French doctor Jean Baptiste Louis de Thesacq de Bienville (1726-1813), coined from Greek nymphē "bride, young wife, young lady" (see nymph) + mania "madness" (see mania). Perhaps influenced by earlier French nymphomanie. Defined as "a female disease characterized by morbid and uncontrollable sexual desire." Compare also nympholepsy.