ORBICELLA 



ORGANIC 



wild; orang, man. ]= Orang- 

 outang = Simla satyrus : a 

 gibbon, four feet high, with 

 bulky body, feet longer than 

 hands, arms reaching to 

 ankle; thumb and great 

 toes short. Lives in forest 

 trees of Borneo and Su- 

 matra. Agile 0. = Hylo- 

 batesagilis. Gray 0.=Hy- 

 lobates leuciscus. 



Orbicella, (or-bi-sel'la). [L. 

 orbis, circle.] 0. caver nosa: 

 a coral polyp, usually bud- 

 ding in all directions, so as 

 to form a hemisphere. Orang-outang. 



Orbicula, (or-bik'u-la). [L. orbiculus, a small 

 circle.] A genus of Brachiopoda. 



Orbit, (or'bit). [L. orbita, track.] 1. The 

 path in which a secondary planet travels 

 round its primary, or the path of a planet 

 round the sun. 2. The cavity of the eye. 



Orbitolites, (or-bit-o-li'tez). [L. orbis, circle.] 

 Animals belonging to Rhizopoda, found iu 

 Tertiary rocks, and still extant. 



Orbitosphenoid, ( or-bit-o-sfe'noid ). [Orbit, 

 q.v. ; Gk. sphcen, wedge ; eidos, form.] A 

 part of the third cranial segment, forming 

 the back of the orbit: in man the lesser 

 wings of the sphenoid bone, which in Rumi- 

 nantia become the greater wings. 



Orbulina, (or-bu-li'na). [L. orbis, a circle.] 

 0. universa: a foraminifera in the form of a 

 email perforated sphere, found at the bottom 

 of the Atlantic. 



Orcein, (or'se-in). [Orcin, ?.r.]=C 7 H 7 N0 3 : a 

 red colouring matter obtained from lichen = 

 Orcin and oxygen. 



Orchard, (or'cherd). [A.-S. wyrt, herb; geard, 

 yard.] A fruit garden. 0. 0noZe=Bob-o- 

 link=Xanthornis varius, 



Orchall=;Orchilla, q.v. 



Orchidacese, (or-ki-da'se-e). [Orchis, q.v.]= 

 Orchids: common herbaceous shrubs, with 

 flowers of very varied and often grotesque 

 shapes, belonging to Orchidales. 



Orchidales, (or-ki-da'lez). [Orchis, q.v.'] Or- 

 chids, &c. : plants forming a division of 

 Endogens. 



Orchil=0rchilla, q.v. 



Orchilla, (or-chil'la). [The Spanish name.] 

 =Roccella tinctoria: a grey lichen, found 

 on the rocks in Cape Verd Islands, from 

 which a purple dye, Archil, q.v., is obtained. 



Orchis, (or'kis). [The Latin name.] A plant, 

 the type of Orchidacese, 

 q.v. Bee 6>.=0phrys api- 

 fera. Bird's nest 0. = 

 Listera nidus avis. Bog 

 0. = Malaxis paludosa. 

 Butterfly 0. = Habenaria 

 bifolia. Dwarf 0. = O. 

 ustulata. Fen 0.=Lip- 

 aris Lceselii. Fly 0. = 

 Ophrys muscifera. Fool's 

 0.=O. Morio. Frog 0.= 

 Habenaria viridis. Liz- 

 ard 0. = O. hircina. 

 3fcmO.=Aceras. Marsh Orchis. 



0. O. latifolia. Meadow 0. = O. morio. 

 Monkey 0.=O. simia. Musk 0.=Hermin- 

 ium. ^Purple 0.=O. mascula. Spider O.= 

 Ophrys aranifera. Spotted O. =O. maculata. 



Orcin, (or'sin). [The French word.] =C 7 H 8 O 2 : 

 a sweet crystalline substance, obtained from 

 various varieties of lichen. 



Order, (or'der). [L. ordo, arrangement.] 1. 

 The arrangement and decoration of a column 

 and entablature 



( architrave. 

 Entablature = -j frieze. 

 ( cornice. 

 ( capital. 



Column= -J shaft, 

 (base. 



The orders are said to be Composite, Corin- 

 thian, Doric, Ionic, or Tuscan, according to 

 the proportions and the ornamentation, 

 especially of the capital. 2. A sub-division 

 of Class, v. Orders. 



Orders, (or'derz). [Order, q.v.] Sub-divisions 

 of classes, in the classification of animals 

 and plants, v. Tables. No orders of plants 

 are known entirely fossil. Sometimes used 

 as=family and as tribe. 



Ordinary ray, v. Refraction. 



Ordinate, (or'di-nat). [L. ordinatus, ordered.] 

 A line drawn perpendicular to one of the 

 axes of a curve. O. of a conic section= 

 Latus rectum, q.v. 



Ordnance, (ord'nans). Heavy artillery: guns, 

 mortars, and howitzers; divided into smooth 

 bore and rifled; and the latter into breech 

 loaders and muzzle loaders. 0. survey: a 

 survey of the country carried out by the 

 Ordnance Department, the maps of which 

 are issued on a scale of 1 inch to a mile, and 

 also of 6 inches. 



Ore, (or). [Or, the A.-S. name.] A general 

 term for combinations of metals and earthy 

 and other matters: mineral substances con- 

 taining metal. E.g. Goose- dung 0.=Gano- 

 matite. Needle 0. v. Needle ore. Prismatic 

 Iron 0.=Brown oxide of iron. 



Oreas, (or-e'as). [L. oreas, mountain nymph.] 



0. canna= Eland. 



Orellin, (or-ellin). [Orellana.] A yellow 

 colouring matter obtained from the seeds of 

 Bixa orellana. 



Oreodaphne, ( or-e-6-dafne ). [Gk. oreios, 

 mountainous; daphne, laurel.] Mountain- 

 laurel: a plant belonging to Lauraceae. 



Oreotrochilus, (or-e-6-trok'i-lus). [Gk. oreios, 

 mountainous; Trochilus, q.v.] A humming- 

 bird, v. Humming-birds. 



Organ, (or'gan). [Organum, the Latin word.] 



1. A part of a living body having a function 

 to fulfil, cf. Member, v. Organs. 2. An 

 arrangement of pipes, on a large scale, 

 adapted to the production of musical sounds. 

 0. corai=Tubiporamusica. O.fish=Drum= 

 Pogonais: a fish which makes a loud singing 

 noise, found in Borneo. 



Organic, (or-gan'ik). [Organ, q.v.] O.acids=O. 

 substances forming salts with bases: Mono- 

 basic, dibasic, tri basic, or poly basic, according 

 as they contain one, two, three, or many atoms 

 of replaceable hydrogen. 0. alkalies O: 



