exo gastritis

[Pref. exo-, and Eng., ., gastritis (q. v..] Pathol.: Inflammation of the external membrane of the stomach. engender, to produce.] ěx-ô-gen, s. [Gr. exō -without, and gennao =to thickne by the addition of fresh layers arranged 1. Sing .: A plant, the stem of which increases in externally around those previously existing. The structure is best seen in the stems of trees belonging to this sub-kingdom. A stem of this type has a central pith surrounded by as many concentric layers of wood as the tree is years old, the whole defended externally by a hollow cylindrical sheath of bark. From the central pith to this bark run a series of radii to the circumferential bark, which are called medullary rays. These peculiarities in the stem are uniformly a oci Exogen. ated with others in the seed. There are in exogens two seed-leaves, or cotyledons, as they are called [COTYLEDON], and the plants themselves are in con. sequence called Dicotyledons (q. v.). The leaves, 2. Pl . ( exogens ): A sub-kingdom or cla of plants No.1. Lindley prefers to call it a cla , and divides presenting the characteristics enumerated under them many alliances, the latter divided into orders: it into four sub-cla es, these having under ales, (2) Urtica les, (3) Euphorbia les, (4) Quern a les, (5) Sub-cla I.-Diclinous Exogens. -Alliances: (1) Ament- Papaya les. Garrya les, (6) Men is per males, (7) Cucurbit a les, and (8) Violales, (2) Cistales, (3) Malvales, (4) Sap in dales, (5) Sub-cla II.-Hypogynous Exogens.- Alliances: (1) Guttiferales, (6) Nympha les, (7) Ranales, (8) Berberales, (9) Ericales, (10) Rutales, (11) Geraniales, (12) Silen a les, (13) Chenopod a les, and (14) Pipe rales. Fico i dales, (2) Daphnales, (3) Rosales, (4) Sax if raga les, Sub-cla III.-Perigynous Exogens.-Alliances: (1) sales, (9) Echiales, (10) Bignonia les. (5) Rhamnales, (6) Gentian a les, (7) Solan a les, (8) Cortu Campana les, (2) Myrtales, (3) Cactales, (4) Gro a les, (5) Sub-cla IV.- Epigynous Exogens. Alliances: (1) Cinchona les, (6) Umbellales and As a rales. (See these words.) Natural System of Botany , Exogens were divided In an earlier work by the same author, Lindley's McNab adopts the following cla ification, modified into Polype tale, Monopetale, and Apetale. Mr. from Pranti and Luer en: Sub-cla I.-Choripetalæ.-Petals never united, flowers thinæ, (3) Tricoccæ, (4) Aphanocyclicæ, (5) Eucyclicæ, often mono-achlamydeous.-(1) Julifloræ, (2) Terebin(6) Centrospermæ, (7) Calycifloræ. Sub-cla II.-Gamopetale.-Petals united into a tube, or at least united at the base, scarcely quite separate, rarely wanting (1) Isocarpeæ, (2) Anisocarpeæ. Palæobotany : The Exogens are first met with in difficult, especially when founded on fragments of of the Tertiary. But their identification is very the Cretaceous rocks, and exist in all the divisions leaves, or other parts, not in any way connected with fructification. -ite ( Palæont .) (q. v.).] *ěx-og-en-ite, s. [Eng., ., exogen , and suff. Palæont .: A fo il exogen, the order of which is unknown. suff.- ous.] ěx-og-en-ous, a. [Eng., ., exogen (q. v.), and Botany : when fresh layers are deposited, they are added to 1. Of wood : Having developed in such a way that, the outside of that previously existing. lating to the sub-kingdom or cla of Exogens. 2. Of Botanical Cla ification: Pertaining or re