talc – מילון אנגלי-אנגלי
talc
n.
magnesium silicate powder (used in cosmetics, medicine, etc.); talcum powder
TALC
Talc is a mineral composed of magnesium silicate.
Talc
Talc (derived from
tālk;
ṭalq) is a
mineral composed of
hydrated magnesium silicate with the chemical formula H
2Mg
3(SiO
3)
4 or Mg
3Si
4O
10(OH)
2. In loose form, it is the widely used substance known as
baby powder (aka talcum). It occurs as foliated to fibrous masses, and in an exceptionally rare
crystal form. It has a perfect
basal cleavage, and the folia are non-
elastic, although slightly flexible. It is the softest known mineral and listed as
1 on the
Mohs hardness scale. As such, it can be easily scratched by a
fingernail. It has a
specific gravity of 2.5–2.8, a clear or dusty
luster, and is translucent to opaque. Talc is not soluble in water, but it is slightly soluble in dilute
mineral acids. Its color ranges from
white to
grey or
green and it has a distinctly greasy feel. Its
streak is white.
talc
Noun
1. a fine grained mineral having a soft soapy feel and consisting of hydrated magnesium silicate; used in a variety of products including talcum powder
(synonym) talcum
(hypernym) mineral
(hyponym) soapstone, soaprock, soap-rock, steatite
(substance-holonym) talcum, talcum powder
Verb
1. apply talcum powder to (one's body)
(hypernym) powder
(derivation) talcum
talc
nm.
talcum, talc, magnesium silicate powder; powder prepared from purified talc (used to soothe or perfume the skin)
Talc
(n.)
A soft mineral of a soapy feel and a greenish, whitish, or grayish color, usually occurring in foliated masses. It is hydrous silicate of magnesia. Steatite, or soapstone, is a compact granular variety.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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