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"psychic drive or energy, usually associated with sexual instinct," 1892, carried over untranslated in English edition of Krafft-Ebing's "Psychopathia Sexualis"; and used in 1909 in A.A. Brill's translation of Freud's "Selected Papers on Hysteria" (Freud's use of the term led to its popularity); from Latin libido "desire, lust," from libere "to be pleasing, to please," ultimately cognate with Old English lufu (see love (n.)).
libido li·bi·do (lĭ-bē'dō, -bī'-)
n. pl. li·bi·dos
The psychic and emotional energy associated with instinctual biological drives.
Manifestation of the sexual drive.