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The Collaborative International Dictionary
Interosculant

Interosculant \In`ter*os"cu*lant\, a.

  1. Mutually touching or intersecting; as, interosculant circles.

  2. (Biol.) Uniting two groups; -- said of certain genera which connect family groups, or of species that connect genera. See Osculant.

Wiktionary
interosculant

a. 1 mutual touching or intersecting. 2 (context biology English) Uniting two groups; said of certain genus which connect family groups, or of species that connect genera.