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Th
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In Old English, the article the, when the following word began with a vowel, was often written with elision as if a part of the word. Thus in Chaucer, the forms thabsence, tharray, thegle, thend, thingot, etc., are found for the absence, the array, the eagle, the end, etc.
Thack
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Alt. of Thacker
Thacker
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See Thatch, Thatcher.
Thak
v. t.
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To thwack.
Thalamencephalon
n.
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The segment of the brain next in front of the midbrain, including the thalami, pineal gland, and pituitary body; the diencephalon; the interbrain.
Thalamic
a.
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Of or pertaining to a thalamus or to thalami.
Thalamiflorous
a.
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Bearing the stamens directly on the receptacle; -- said of a subclass of polypetalous dicotyledonous plants in the system of De Candolle.
Thalamocoele
n.
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The cavity or ventricle of the thalamencephalon; the third ventricle.
Thalamophora
n. pl.
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Same as Foraminifera.
Thalami
pl.
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of Thalamus
Thalamus
n.
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A mass of nervous matter on either side of the third ventricle of the brain; -- called also optic thalamus.
Thalamus
n.
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Same as Thallus.
Thalamus
n.
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The receptacle of a flower; a torus.
Thalassian
n.
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Any sea tortoise.
Thalassic
a.
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Of or pertaining to the sea; -- sometimes applied to rocks formed from sediments deposited upon the sea bottom.
Thalassinian
n.
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Any species of Thalaassinidae, a family of burrowing macrurous Crustacea, having a long and soft abdomen.
Thalassography
n.
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The study or science of the life of marine organisms.
Thaler
n.
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A German silver coin worth about three shillings sterling, or about 73 cents.
Thalia
n.
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That one of the nine Muses who presided over comedy.
Thalia
n.
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One of the three Graces.
Thalia
n.
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One of the Nereids.
Thaliacea
n. pl.
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A division of Tunicata comprising the free-swimming species, such as Salpa and Doliolum.
Thalian
a.
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Of or pertaining to Thalia; hence, of or pertaining to comedy; comic.
Thallate
n.
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A salt of a hypothetical thallic acid.
Thallene
n.
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A hydrocarbon obtained from coal-tar residues, and remarkable for its intense yellowish green fluorescence.
Thallic
a.
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Of or pertaining to thallium; derived from, or containing, thallium; specifically, designating those compounds in which the element has a higher valence as contrasted with the thallous compounds; as, thallic oxide.
Thalline
a.
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Consisting of a thallus.
Thalline
n.
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An artificial alkaloid of the quinoline series, obtained as a white crystalline substance, C10H13NO, whose salts are valuable as antipyretics; -- so called from the green color produced in its solution by certain oxidizing agents.
Thallious
a.
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See Thallous.
Thallium
n.
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A rare metallic element of the aluminium group found in some minerals, as certain pyrites, and also in the lead-chamber deposit in the manufacture of sulphuric acid. It is isolated as a heavy, soft, bluish white metal, easily oxidized in moist air, but preserved by keeping under water. Symbol Tl. Atomic weight 203.7.