D defs.my
Entry 2 senses Webster, 1913

Interosculant

· In·ter·os·cu·lant · IPA
01 a. Mutually touching or intersecting; as, interosculant circles.
  1. 1.
    Mutually touching or intersecting; as, interosculant circles.
  2. 2.
    Uniting two groups; -- said of certain genera which connect family groups, or of species that connect genera. See Osculant.(Biol.) See: Osculant