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Vesuvianite :: Vesuvianite (n.) A mineral occurring in tetragonal crystals, and also massive, of a brown to green color, rarely sulphur yellow and blue. It is a silicate of alumina and lime with some iron magnesia, and is common at Vesuvius. Also called idocrase..

Didymium :: Didymium (n.) A rare metallic substance usually associated with the metal cerium; -- hence its name. It was formerly supposed to be an element, but has since been found to consist of two simpler elementary substances, neodymium and praseodymium. See Neodymium, and Praseodymium..

Laurite :: Laurite (n.) A rare sulphide of osmium and ruthenium found with platinum in Borneo and Oregon.

Luxury :: Luxury (n.) Anything which pleases the senses, and is also costly, or difficult to obtain; an expensive rarity; as, silks, jewels, and rare fruits are luxuries; in some countries ice is a great luxury..

Deintevous :: Deintevous (a.) Rare; excellent; costly.

Aspire :: Aspire (v. t.) To desire with eagerness; to seek to attain something high or great; to pant; to long; -- followed by to or after, and rarely by at; as, to aspire to a crown; to aspire after immorality..

Columbium :: Columbium (n.) A rare element of the vanadium group, first found in a variety of the mineral columbite occurring in Connecticut, probably at Haddam. Atomic weight 94.2. Symbol Cb or Nb. Now more commonly called niobium..

Present :: Present (a.) Present letters or instrument, as a deed of conveyance, a lease, letter of attorney, or other writing; as in the phrase, Know all men by these presents, that is, by the writing itself, per has literas praesentes; -- in this sense, rarely used in the singular..

Infrequency :: Infrequency (n.) The state of rarely occuring; uncommonness; rareness; as, the infrquence of his visits..

Heart :: Heart (n.) The seat of the affections or sensibilities, collectively or separately, as love, hate, joy, grief, courage, and the like; rarely, the seat of the understanding or will; -- usually in a good sense, when no epithet is expressed; the better or lovelier part of our nature; the spring of all our actions and purposes; the seat of moral life and character; the moral affections and character itself; the individual disposition and character; as, a good, tender, loving, bad, hard, or selfish h

Tenne :: Tenne (n.) A tincture, rarely employed, which is considered as an orange color or bright brown. It is represented by diagonal lines from sinister to dexter, crossed by vertical lines..

Lanthanum :: Lanthanum (n.) A rare element of the group of the earth metals, allied to aluminium. It occurs in certain rare minerals, as cerite, gadolinite, orthite, etc., and was so named from the difficulty of separating it from cerium, didymium, and other rare elements with which it is usually associated. Atomic weight 138.5. Symbol La..

Borneol :: Borneol (n.) A rare variety of camphor, C10H17.OH, resembling ordinary camphor, from which it can be produced by reduction. It is said to occur in the camphor tree of Borneo and Sumatra (Dryobalanops camphora), but the natural borneol is rarely found in European or American commerce, being in great request by the Chinese. Called also Borneo camphor, Malay camphor, and camphol..

Ruthenium :: Ruthenium (n.) A rare element of the light platinum group, found associated with platinum ores, and isolated as a hard, brittle steel-gray metal which is very infusible. Symbol Ru. Atomic weight 103.5. Specific gravity 12.26. See Platinum metals, under Platinum..

Addison's Disease :: Addison's disease () A morbid condition causing a peculiar brownish discoloration of the skin, and thought, at one time, to be due to disease of the suprarenal capsules (two flat triangular bodies covering the upper part of the kidneys), but now known not to be dependent upon this causes exclusively. It is usually fatal..

Trefle :: Trefle (a.) Having a three-lobed extremity or extremities, as a cross; also, more rarely, ornamented with trefoils projecting from the edges, as a bearing..

Edentata :: Edentata (n. pl.) An order of mammals including the armadillos, sloths, and anteaters; -- called also Bruta. The incisor teeth are rarely developed, and in some groups all the teeth are lacking..

Ultramontanism :: Ultramontanism (n.) The principles of those within the Roman Catholic Church who maintain extreme views favoring the pope's supremacy; -- so used by those living north of the Alps in reference to the Italians; -- rarely used in an opposite sense, as referring to the views of those living north of the Alps and opposed to the papal claims. Cf. Gallicanism..

Agreeably :: Agreeably (adv.) In accordance; suitably; consistently; conformably; -- followed by to and rarely by with. See Agreeable, 4..

Chromosphere :: Chromosphere (n.) An atmosphere of rare matter, composed principally of incandescent hydrogen gas, surrounding the sun and enveloping the photosphere. Portions of the chromosphere are here and there thrown up into enormous tongues of flame..

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