osculate

osculate

[os-kyuh-leyt]
verb (used without object), osculated, osculating.
1.
to come into close contact or union.
2.
Geometry. (of a curve) to touch another curve or another part of the same curve so as to have the same tangent and curvature at the point of contact.
verb (used with object), osculated, osculating.
3.
to bring into close contact or union.
4.
Geometry. (of a curve) to touch (another curve or another part of the same curve) in osculation.
5.
to kiss.

Origin:
1650–60; < Latin ōsculātus (past participle of ōsculārī to kiss), equivalent to ōscul(um) kiss, literally, little mouth (see osculum) + -ātus -ate1

osculatory [os-kyuh-luh-tawr-ee, -tohr-ee] , adjective
unosculated, adjective

oscillate, osculate.
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World English Dictionary
osculate (ˈɒskjʊˌleɪt)
 
vb
1.  jocular usually to kiss
2.  (intr) (of an organism or group of organisms) to be intermediate between two taxonomic groups
3.  geometry to touch in osculation
 
[C17: from Latin ōsculārī to kiss; see osculum]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

osculate
"to kiss," 1656, from L. osculari, from osculum "kiss," lit. "little mouth," dim. of os "mouth" (see oral).
Online Etymology Dictionary, © 2010 Douglas Harper
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