| 释义 |
oxygon, a. and n. Geom. Now rare or Obs.|ˈɒksɪgən|
Also 6–7 oxi-.
[f. L. oxygōni-us, a. Gr. ὀξυγώνιος acute-angled, f. ὀξύ-ς sharp + γωνία angle: perh. through F. oxygone (1611 in Cotgr.).]
a. adj. Having acute angles, acute-angled.
b. n. An acute-angled triangle: in early use also in L. form oxygonium (-us).
1570Billingsley Euclid i. def. xxix. 5 An oxigonium or an acuteangled triangle, is a triangle which hath all his three angles acute. 1598Sylvester Du Bartas ii. ii. iv. Columnes 199 Moreover, as the Building's Ambligon May more receive then Mansion's Oxigon. 1685R. Williams Euclid 10 Oxygone, or Acutangle triangle is that whose angles are all acute. 1688J. S. Fortification 3 [These figures] are called Oxygoniums. 1838Sir W. Hamilton Logic xxv. (1866) II. 24 note, Oxygon, i.e. triangle which has its three angles acute.
Hence oxygonal |ɒkˈsɪgənəl|, † oxyˈgonial, oˈxygonous adjs., having three acute angles.
1706Phillips, Oxygonial, belonging to an Oxygon, Acute-Angular. 1727–41Chambers Cycl. s.v. Triangle, If all the angles be acute..the triangle is said to be acutangular, or oxygonous. 1842Francis Dict. Arts, Oxygonal, acute angled. |