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plural circumferences
(geometry) The line that bounds a circle or other two-dimensional figure. examples
(geometry) The length of such a line. examples
(obsolete) The surface of a round or spherical object.
(graph theory) The length of the longest cycle of a graph. examples
third-person singular simple present circumferences, present participle circumferencing, simple past and past participle circumferenced
(obsolete, transitive) To include in a circular space; to bound. quotations
Nor is the vigour of this great body included only in itself, or circumferenced by its surface
1650, Thomas Browne, Pseudodoxia Epidemica: […], 2nd edition, London: […] A[braham] Miller, for Edw[ard] Dod and Nath[aniel] Ekins, […]