An anaphrodisiac (also antaphrodisiac or antiaphrodisiac) is something that quells or blunts the libido. It is the opposite of an aphrodisiac, something that enhances sexual appetite. The word anaphrodisiac comes from the Greek privative prefix ἀν-, denoting negation, and aphrodisiac, from the Greek goddess of love, Aphrodite. ==Available anaph...
• (a. & n.) Same as Antaphrodisiac.
Reduces sexual desire.
A chemical that inhibits sexual response. ... (09 Oct 1997) ... 
(an″af-ro-diz´e-ak) repressing sexual desire. a drug that represses sexual desire.
reduces sexual desire
An·aph`ro·dis'i·ac adjective & noun [ Greek 
Type: Term Pronunciation: an′af-rō-diz′ē-ak Definitions: 1. Relating to anaphrodisia. 2. Repressing or destroying sexual desire. 3. An agent that lessens or eliminates sexual desire. Synonyms: antaphrodisiac, antaphroditic1
An herb or substance that reduces or represses sexual desire or potency. 
[adj] - tending to diminish sexual desire
anaphrodisiac 1. Something which decreases sexual desires. 2. Tending to diminish sexual desire. 3. A chemical that inhibits sexual response. 4. Repressing or destroying sexual desire.
adjective tending to diminish sexual desire
Decreases sensual awareness and sexual desire.