| 释义 |
‖ rhombus|ˈrɒmbəs|
Also 6–8 rombus. Pl. rhombuses (7–8 -us's); 8 rhombi.
[L., a. Gr. ῥόµβος.]
1. Geom. = rhomb 1.
1567J. Maplet Gr. Forest 18 Rhombus, a figure with y⊇ Mathematicians foure square: hauing the sides equall, the corners crooked. 1571Digges Pantom. ii. vi, Admitte ABCD the Rhombus, whose Area I desire. 1672Boyle Virtues of Gems 73 Some [of the planes] were most of kinn to a Rhombus, others to a Rhomboeides. 1672[see rhomboid B. 1]. 1797Encycl. Brit. (ed. 3) V. 584/2 A quadrangular prism composed of four rhombi. 1825J. Nicholson Operat. Mechanic 688 To find the area of a parallelogram: whether it be a square, a rectangle, a rhombus, or a rhomboid. 1862Rawlinson Anc. Mon. iv. I. 313 Mark the angles of a Rhombus very much slanted from the perpendicular. 1878Gurney Crystallogr. 66 A six-sided prism with three rhombuses at each end.
b. Comb., as rhombus-shaped adj.; rhombus-solid = rhomb-solid.
1776J. Lee Introd. Bot. Explan. Terms 383 Rhombeum, rombus-shaped, an irregular four-sided Figure. 1795Hutton Math. Dict. II. 373/1 Rhombus-Solid.
2. A rhomb-shaped instrument, pattern, etc.
1614Sturtevant Metallica xiv. 103 The plegnick Rhombus is an Engin of extraordinary..power. 1658Sir T. Browne Gard. Cyrus ii, The Sheare and wedge Battles, each made of half a Rhombus. 1697W. Dampier Voy. (1699) 499, 6 Leagues to the West of Diamond Point, which makes with three Angles of a Rhombus, and is low Land. 1772–84Cook's Voy. (1790) V. 1731 White mats..with many red stripes, rhombuses, and other figures interwoven on one side. 1846Holtzapffel Turning 764 Mosaic works, consisting of groups either of triangles, rhombuses, or of squares.
3. A genus of flat-fishes comprising the turbot and the brill; a fish of this genus.
[1686Willughby Hist. Pisc. 93.] 1753Chambers Cycl. Suppl., Rhombo, the name of a peculiar fish of the rhombus, or turbot kind. 1876Van Beneden's Anim. Parasites 31 De Kay found one [sc. a cymothoe] in a Rhombus in the United States.
4. Conch. A shell of the genus Oliva.
1776Da Costa Elem. Conchol. 227 From which [rhombic shape]..I have allotted them [sc. olives] the name of Rhombi. 1797Encycl. Brit. (ed. 3) XVII. 353/1 Panama is famous for the cylinders or rhombi. |