Jacchus

• (n.) The common marmoset (Hapale vulgaris). Formerly, the name was also applied to other species of the same genus.
Found on http://thinkexist.com/dictionary/meaning/jacchus/

Jacchus

Jac'chus noun [ New Latin , from Latin Jacchus a mystic name of Bacchus, Greek ....] (Zoology) The common marmoset ( Hapale vulgaris ). Formerly, the name was also applied to other species of the same genus.
Found on http://www.encyclo.co.uk/webster/J/1
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