chalk /ˈʧɔk/ 名詞
1. Min. A soft, earthy substance, of a white, grayish, or yellowish white color, consisting of calcium carbonate, and having the same composition as common limestone.
2. Fine Arts Finely prepared chalk, used as a drawing implement; also, by extension, a compound, as of clay and black lead, or the like, used in the same manner. See Crayon.
Black chalk, a mineral of a bluish color, of a slaty texture, and soiling the fingers when handled; a variety of argillaceous slate.
By a long chalk, by a long way; by many degrees. [Slang] --Lowell.
Chalk drawing Fine Arts, a drawing made with crayons. See Crayon.
Chalk formation. See Cretaceous formation, under Cretaceous.
Chalk line, a cord rubbed with chalk, used for making straight lines on boards or other material, as a guide in cutting or in arranging work.
Chalk mixture, a preparation of chalk, cinnamon, and sugar in gum water, much used in diarrheal affection, esp. of infants.
Chalk period. Geol. See Cretaceous period, under Cretaceous.
Chalk pit, a pit in which chalk is dug.
Drawing chalk. See Crayon, n., 1.
French chalk, steatite or soapstone, a soft magnesian mineral.
Red chalk, an indurated clayey ocher containing iron, and used by painters and artificers; reddle.
Chalk, v. t. [imp. & p. p. Chalked p. pr. & vb. n. Chalking.]
1. To rub or mark with chalk.
2. To manure with chalk, as land.
3. To make white, as with chalk; to make pale; to bleach.
Let a bleak paleness chalk the door. --Herbert.
To chalk out, to sketch with, or as with, chalk; to outline; to indicate; to plan. [Colloq.] “I shall pursue the plan I have chalked out.”
n 1: a soft whitish calcite
2: a pure flat white with little reflectance
3: amphetamine used in the form of a crystalline hydrochloride;
used as a stimulant to the nervous system and as an
appetite suppressant [syn: methamphetamine, methamphetamine
hydrochloride, Methedrine, meth, deoxyephedrine, chicken
feed, crank, glass, ice, shabu, trash]
4: a piece of chalk (or similar substance) used for writing on
blackboards or other surfaces
v : write, draw, or trace with chalk