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"Section C"

Called also
calc-spar and calcareous spar.


&fist; 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 (-trā"shŭn),
n. Act of kicking.


Cal"ci*um (kăl"s&ibreve;*ŭm),
n. [NL., from L. calx, calcis,
lime; cf F. calcium. See Calx.] (Chem.)
An elementary substance; a metal which combined with oxygen
forms lime.


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