† icosaedern.
Obsolete.
= icosahedron n.
ΚΠ
1656 T. Stanley Hist. Philos. II. v. 72 The Octaedors consist of eight like sides..The Icosaeders of twenty .
This entry has not yet been fully updated (first published 1899; most recently modified version published online June 2018).
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n.1656