vigesimal Definitions

WordNet (r) 3.0 (2005)

adj
1: relating to or based on the number twenty

Merriam Webster's

adjective Etymology: Latin vicesimus, vigesimus twentieth; akin to Latin viginti twenty, Greek eikosi Date: circa 1656 based on the number 20

English Explanatory Dictionary

?v?d??l n. 1 a keeping awake during the time usually given to sleep,esp. to keep watch or pray (keep vigil). b a period of this. 2 Eccl. the eveof a festival or holy day. 3 (in pl.) nocturnal devotions. [ME f. OF vigilef. L vigilia f. vigil awake]

Oxford Reference Dictionary

adj. 1 of twentieths or twenty. 2 reckoning or reckoned by twenties. Derivatives: vigesimally adv. Etymology: L vigesimus f. viginti twenty

Webster's 1913 Dictionary

Vigesimal Vi*ges"i*mal, a. [L. vigesimus twentieth, from viginti twenty.] Twentieth; divided into, or consisting of, twenties or twenty parts. --Tylor.