(||Cal`ci*spon"gi*æ) n. pl. [NL., fr. L. calx, calcis, lime + spongia a sponge.] (Zoöl.) An
order of marine sponges, containing calcareous spicules. See Porifera.
(Cal"cite) n. [L. calx, calcis, lime.] (Min.) Calcium carbonate, or carbonate of lime. It is rhombohedral
in its crystallization, and thus distinguished from aragonite. It includes common limestone, chalk, and
marble. Called also calc-spar and calcareous spar.
Argentine is a pearly lamellar variety; aphrite is foliated or chalklike; dogtooth spar, a form in acute rhombohedral
or scalenohedral crystals; calc- sinter and calc-tufa are lose or porous varieties formed in caverns or
wet grounds from calcareous deposits; agaric mineral is a soft, white friable variety of similar origin;
stalaclite and stalagmite are varieties formed from the drillings in caverns. Iceland spar is a transparent
variety, exhibiting the strong double refraction of the species, and hence is called doubly refracting spar.
(Cal"ci*trant) a. [L. calcitrans, p. pr. of calcitrare to kick, fr. calx, calcis , heel.] Kicking.
Hence: Stubborn; refractory.
(Cal"ci*trate) v. i. & i. [L. calcitratus, p. p. of calcitrare. See Calcitrant.] To kick.
(Cal`ci*tra"tion) n. Act of kicking.
(Cal"ci*um) n. [NL., from L. calx, calcis, lime; cf F. calcium. See Calx.] (Chem.) An elementary
substance; a metal which combined with oxygen forms lime. It is of a pale yellow color, tenacious, and
malleable. It is a member of the alkaline earth group of elements. Atomic weight 40. Symbol Ca.
Calcium is widely and abundantly disseminated, as in its compounds calcium carbonate or limestone,
calcium sulphate or gypsum, calcium fluoride or fluor spar, calcium phosphate or apatite.
Calcium light, an intense light produced by the incandescence of a stick or ball of lime in the flame
of a combination of oxygen and hydrogen gases, or of oxygen and coal gas; called also Drummond
(Cal*civ"o*rous) a. [L. calx lime + vorare to devour.] Eroding, or eating into, limestone.
(Cal*cog"ra*pher) n. One who practices calcography.
(Cal`co*graph"ic Cal`co*graph"ic*al), a. Relating to, or in the style of, calcography.
(Cal*cog"ra*phy) n. [L. calx, calcis, lime, chalk + -graphy.] The art of drawing with chalk.
(Calc"-sin`ter) n. [G. kalk (L. calx, calcis) lime + E. sinter.] See under Calcite.
(Calc"-spar`) n. [G. kalk (L. calx) lime E. spar.] Same as Calcite.
(Calc"-tu`fa) n. [G. kalk (l. calx) lime + E. tufa.] See under Calcite.
(Cal"cu*la*ble) a. [Cf. F. calculable.] That may be calculated or ascertained by calculation.
(Cal"cu*la*ry) a. [L. calculus a pebble, a calculus; cf calcularius pertaining to calculation.]
(Med.) Of or pertaining to calculi.
(Cal"cu*la*ry), n. A congeries of little stony knots found in the pulp of the pear and other
(Cal"cu*late) v. i. [imp. & p. p. Calculater ; p. pr. & vb. n. Calculating ] [L, calculatus, p.
p. of calculate, fr. calculus a pebble, a stone used in reckoning; hence, a reckoning, fr. calx, calcis, a
stone used in gaming, limestone. See Calx.]