Etymology
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salivate (v.)

1650s, transitive, "cause to produce an unusual or excess secretion of saliva" (implied in salivating); intransitive sense "produce an abnormally abundant flow of saliva" is from 1660s, from Latin salivatus, past participle of salivare, from saliva (see saliva). Figurative use in reference to anticipation is by 1951. Related: Salivated.

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Definitions of salivate

salivate (v.)
produce saliva;
We salivated when he described the great meal
salivate (v.)
be envious, desirous, eager for, or extremely happy about something;
Synonyms: drool
From wordnet.princeton.edu