| 释义 |
pulverulent, a.|pʌlˈvɛr(j)ʊlənt|
[f. L. pulverulent-us dusty, f. pulver-em dust, powder: see -lent. So mod.F. pulvérulent (1801 in Littré).]
1. Consisting of or having the form of powder or dust; powdery.
1656Blount Glossogr., Pulverulent, dusty, of dust, full of dust. 1806Saunders Mineral Waters i. 20 The glutinous part of wheat flour, [which is] dry and pulverulent. 1830Lindley Nat. Syst. Bot. 316 In Lycopodium..the pulverulent thecæ occupy the upper ends of the shoots. 1883Athenæum 11 Aug. 183/2 The announcement by M. Spring that a pressure of 5,000 atmospheres caused pulverulent matters to aggregate into crystalline masses.
2. Covered with powder or dust; dusty; spec. in Entom. and Bot.
1744Akenside Poet, On shelves pulverulent, majestic stands His library. 1826Kirby & Sp. Entomol. IV. xlvi. 275 Pulverulent,..covered with very minute powder-like scales. 1828R. K. Greville Sc. Crypt. Flora VI. 338 Perithecia..white and pulverulent.
3. Of very slight cohesion; crumbling to dust.
1794Sullivan View Nat. I. 500 Calcareous stone is also found in the pulverulent form; and of this kind is chalk. 1811Pinkerton Petralogy II. 381 Ashes, sand, and light pulverulent scoriæ. 1856Carpenter Microsc. 373 A thallus..which has no very defined limit, and which, in consequence of the very slight adhesion of its component cells, is said to be ‘pulverulent’. 1882Geikie Text-bk. Geol. ii. ii. iii. 91 A rock is said to be..pulverulent, when it readily falls to powder.
4. Pulverizing. rare. erron.
1864Ruskin Arrows of Chace (1880) I. 260 The pulverulent effect [on masses of stone] of original precipitation to glacier level from two or three thousand feet above.
5. Of birds: Characterized by or addicted to lying or rolling in the dust.
1828in Webster. 1869Gillmore tr. Figuier's Rept. & Birds v. 410 Partridges have, like the Quail, the pulverulent instinct.
Hence pulˈverulently adv., in a powdery or dusty manner. † pulveruˈlentous a. (in quot. pulveri-), pulverulent. Obs. rare.
1640Parkinson Theat. Bot. 1594 We have many sorts [of myrrh].., great and small, fat and dry, pulverilentous like, pale and more red. 1821W. P. C. Barton Flora N. Amer. I. 113 Corolla pulverulently rough within. |