单词 | versor |
释义 | † versorn.1 Obsolete. (See quots.) ΘΚΠ the world > food and drink > drink > providing or serving drink > [noun] > serving liquor > cup-bearer birleOE cupper14.. versora1483 cup-bearer1483 tankard-bearer?1518 copper1528 tankard-yeoman1563 gobleter1623 pincern1623 pocillatora1659 tankard-womana1667 a1483 Liber Niger in Coll. Ordinances Royal Househ. (1790) 77 One chief sobyr yeoman versoure, to resceyve all the ale or beere that shall be pourveyede. a1483 Liber Niger in Coll. Ordinances Royal Househ. (1790) 77 Othyr twoe groomes versours in this office to helpe to lodge theyre ale, to helpe drawe it [etc.]. This entry has not yet been fully updated (first published 1917; most recently modified version published online June 2021). versorn.2ΘΚΠ society > travel > travel by water > vessel, ship, or boat > equipment of vessel > navigational aids > [noun] > compass > needle of needle1555 fly?a1560 versor1640 magnetic needle1674 1640 G. Watts tr. F. Bacon Of Advancem. Learning v. ii. 229 So the versor of a Mariners needle applies it selfe to the Poles of the world. 2. Mathematics. In quaternions, an operator which changes the direction of a vector without altering its length. ΘΚΠ the world > relative properties > number > mathematical number or quantity > tensor > [noun] > vector > quaternion > factor or operator in tensor1846 versora1865 a1865 W. R. Hamilton Elem. Quaternions (1866) ii. i. 133 We shall now say that every Radial Quotient is a Versor. A Versor has thus, in general, a plane, an axis, and an angle. 1886 W. S. Aldis Elem. Solid Geom. (ed. 4) xiv. 235 If the two vectors OA and OB be of equal length the change of one into the other is merely an operation of rotation. In this case the quaternion is called a versor. This entry has not yet been fully updated (first published 1917; most recently modified version published online June 2018). < |
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