THALLIUM n.
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.…
THALLOGEN n.
One of a large class or division of the vegetable kingdom, which includes those flowerless plants, such as fungi, algæ, and lichens, that consist of a thallus only, composed of cellular tissue, or of a congeries of cells, or even of separate cells, and never show a distinction into root, stem, and leaf.…
THALLOPHYTA n.
A phylum of plants of very diverse habit and structure, including the algæ, fungi, and lichens. The simpler forms, as many blue-green algæ, yeasts, etc., are unicellular and reproduce vegetatively or by means of asexual spores; in the higher forms the plant body is a thallus, which may be filamentous or may consist of…
THAN conj. 2 definitions
r certain adjectives and adverbs which express comparison or diversity, as more, better, other, otherwise, and the like. It is usually followed by the object compared in the nominative case. Sometimes, however, the object compared is placed in the objective case, and than is then considered by some grammarians as a pre…
THANE n.
A dignitary under the Anglo-Saxons and Danes in England. Of these there were two orders, the king's thanes, who attended the kings in their courts and held lands immediately of them, and the ordinary thanes, who were lords of manors and who had particular jurisdiction within their limits. After the Conquest, this title…