| 释义 |
▪ I. palmate, n. Chem.|ˈpælmeɪt|
[f. palm-ic + -ate4.]
A salt of palmic acid.
1838T. Thomson Chem. Org. Bodies 432 Palmate of soda is obtained by mixing palmic acid with a solution of carbonate of soda. Ibid., Palmate of ammonia may be obtained in the same way.
▪ II. palmate, a. Nat. Hist.|ˈpælmət|
[ad. L. palmāt-us, f. palma palm (of the hand) + -ate2 2.]
1. Of a form like that of an open palm or hand; applied to parts or members of a plant or animal which have narrow or spreading divisions like fingers, properly when these project or radiate from an expanded entire portion like the palm.
spec. a. Bot. Of leaves having lobes or divisions (strictly five in number) whose midribs all radiate from one point at the end of the leaf-stalk, the sinuses being either shallow or deep (see palmati-), or even extending to the base so that the leaf consists of separate leaflets (in this case more properly called digitate); also of tubers having divisions like fingers, as in some species of Orchis. b. Zool. Of the horns of deer when of broad flat form with lateral projecting points, as in the reindeer and moose. c. Entom. Of the antennæ and legs of certain insects: see quot. 1826.
1760J. Lee Introd. Bot. iii. v. (1765) 179 Palmate. 1785Martyn Rousseau's Bot. xxvii. (1794) 424 The leaves are palmate or handed. 1807J. E. Smith Phys. Bot. 109 Globular or palmate knobs or bulbs. 1826Kirby & Sp. Entomol. IV. 321 Palmate. Very short antennæ which send forth externally a few long finger-shaped branches, giving them some resemblance of a hand. Ibid. 329 Palmate. When towards the apex the cubit is armed laterally with several divaricate spiniform teeth. 1855Kingsley Westw. Ho! vi, The great palmate oarweeds which waved along the chasm. 1880Gray Struct. Bot. iii. §4 (ed. 6) 101 Digitate (fingered) was the old name, when the term palmate was restricted to a simple but palmately lobed leaf of this type. But since the time of De Candolle the two names have been used interchangeably.
2. Of the foot of a bird: Having the toes connected by an expanded membrane; webbed.
1826Good Bk. Nat. (1834) II. 41 A palmate or web-foot, formed for swimming. |