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  • English Word Orsellic Definition Pertaining to, or designating, an acid found in certain lichens, and called also lecanoric acid.
  • English Word Orsellinic Definition Pertaining to, or designating, an organic acid obtained by a partial decomposition of orsellic acid as a white crystalline substance, and related to protocatechuic acid.
  • English Word Ort Definition A morsel left at a meal; a fragment; refuse; -- commonly used in the plural.
  • English Word Ortalidian Definition Any one of numerous small two-winged flies of the family Ortalidae. The larvae of many of these flies live in fruit; those of others produce galls on various plants.
  • English Word Orthid Definition A brachiopod shell of the genus Orthis, and allied genera, of the family Orthidae.
  • English Word Orthis Definition An extinct genus of Brachiopoda, abundant in the Paleozoic rocks.
  • English Word Orthite Definition A variety of allanite occurring in slender prismatic crystals.
  • English Word Ortho- Definition A combining form signifying straight, right, upright, correct, regular; as, orthodromy, orthodiagonal, orthodox, orthographic.
  • English Word Ortho- Definition A combining form (also used adjectively)
  • English Word Ortho- Definition The one of several acids of the same element (as the phosphoric acids), which actually occurs with the greatest number of hydroxyl groups; as, orthophosphoric acid. Cf. Normal.
  • English Word Ortho- Definition Connection with, or affinity to, one variety of isomerism, characteristic of the benzene compounds; -- contrasted with meta- or para-; as, the ortho position; hence, designating any substance showing such isomerism; as, an ortho compound.
  • English Word Orthocarbonic Definition Designating a complex ether, C.(OC2H5)4, which is obtained as a liquid of a pleasant ethereal odor by means of chlorpicrin, and is believed to be a derivative of the hypothetical normal carbonic acid, C.(OH)4.
  • English Word Orthocenter Definition That point in which the three perpendiculars let fall from the angles of a triangle upon the opposite sides, or the sides produced, mutually intersect.
  • English Word Orthoceras Definition An extinct genus of Paleozoic Cephalopoda, having a long, straight, conical shell. The interior is divided into numerous chambers by transverse septa.
  • English Word Orthoceratite Definition An orthoceras; also, any fossil shell allied to Orthoceras.
  • English Word Orthoclase Definition Common or potash feldspar crystallizing in the monoclinic system and having two cleavages at right angles to each other. See Feldspar.
  • English Word Orthoclastic Definition Breaking in directions at right angles to each other; -- said of the monoclinic feldspars.
  • English Word Orthodiagonal Definition The diagonal or lateral axis in a monoclinic crystal which is at right angles with the vertical axis.
  • English Word Orthodome Definition See the Note under Dome, 4.
  • English Word Orthodox Definition Sound in opinion or doctrine, especially in religious doctrine; hence, holding the Christian faith; believing the doctrines taught in the Scriptures; -- opposed to heretical and heterodox; as, an orthodox Christian.
  • English Word Orthodox Definition According or congruous with the doctrines of Scripture, the creed of a church, the decree of a council, or the like; as, an orthodox opinion, book, etc.
  • English Word Orthodox Definition Approved; conventional.
  • English Word Orthodoxal Definition Pertaining to, or evincing, orthodoxy; orthodox.
  • English Word Orthodoxality Definition Orthodoxness.
  • English Word Orthodoxally Definition Orthodoxly.
  • English Word Orthodoxastical Definition Orthodox.
  • English Word Orthodoxical Definition Pertaining to, or evincing, orthodoxy; orthodox.
  • English Word Orthodoxly Definition In an orthodox manner; with soundness of faith.
  • English Word Orthodoxness Definition The quality or state of being orthodox; orthodoxy.
  • English Word Orthodoxy Definition Soundness of faith; a belief in the doctrines taught in the Scriptures, or in some established standard of faith; -- opposed to heterodoxy or to heresy.