Meaning

verb be intermediate between two taxonomic groups

verb have at least three points in common with

verb touch with the lips or press the lips (against someone's mouth or other body part) as an expression of love, greeting, etc.

originBorrowed from Latin ōsculātus, perfect active participle of ōsculor (“to kiss”) (see -ate (verb-forming suffix)), from ōsculum (“a kiss”) + -or (verbal suffix), from ōs (“mouth”) + -culum (diminutive suffix). See also oscillate.

Etymology from Wiktionary, CC BY-SA 3.0