1861 (adj.) "characterized by or suffering from nymphomania;" 1867 (n.) "a woman who is afflicted with nymphomania;" from nymphomania.

"involuntary motion of the eyes," 1790, medical Latin, from Greek nystagmos "nodding, drowsiness," from nystazein "to nod, slumber, be sleepy," from PIE *sneud(h)- "to be sleepy." Beekes compares Baltic words such as Lithuanian snūsti "to slumber away." Related: Nystagmatic.