Definition of vertical circle in English:

vertical circle

Syllabification: ver·ti·cal cir·cle

Entry from US English dictionary

noun

A great circle of the celestial sphere whose diameter runs from zenith to nadir.

Definition of vertical circle in:

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Word of the day oleaginous
Pronunciation: ˌəʊlɪˈadʒɪnəs
adjective
rich in, covered with, or producing oil; oily