symmetroidn.

/ˈsɪmɪtrɔɪd/

Etymology: irregularly < symmetry n. + -oid suffix.

Geometry.

Cayley's name for a certain surface of the fourth order: see quot. 1870.

ΚΠ

1870 A. Cayley Coll. Math. Papers VII. 134 The surface which I call a symmetroid; viz., the surface represented by an equation ∆ = 0, where ∆ is a symmetrical determinant of the 4th order the several terms whereof are linear functions of the coordinates (x, y, z, w).

This entry has not yet been fully updated (first published 1919; most recently modified version published online June 2018).

单词	symmetroid
释义	symmetroidn. /ˈsɪmɪtrɔɪd/ Etymology: irregularly < symmetry n. + -oid suffix. Geometry. Cayley's name for a certain surface of the fourth order: see quot. 1870. ΚΠ 1870 A. Cayley Coll. Math. Papers VII. 134 The surface which I call a symmetroid; viz., the surface represented by an equation ∆ = 0, where ∆ is a symmetrical determinant of the 4th order the several terms whereof are linear functions of the coordinates (x, y, z, w). This entry has not yet been fully updated (first published 1919; most recently modified version published online June 2018). < n.1870
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