FORM IN 



268 



FOSSA 



an ant]. Relating to or derived from ants, or per- 

 taining to formic acid. 



Formin {form' -in). C 6 H 12 N 4 . A condensation-product 

 of formic aldehyd and ammonia; an alkaline crystalline 

 powder, soluble in water, slightly soluble in alcohol. 

 It is a uric-acid solvent, diuretic, and vesical antiseptic. 

 Dose, I— 1.5 gm. in the morning in aqueous solution. 

 Syn., Urotropin ; Hexamethylenetetramin. F. Sali- 

 cylate. See Saliformin. 



Formochlor {forvi'-o-klor'). A solution of formic al- 

 dehyd and calcium chlorid. It is used as a disinfec- 

 tant by spraying or vaporizing. 



Formoforin, Formoform (fortn-o-for'-in, form'-o- 

 form). A dusting- powder to relieve perspiring feet, 

 and said to consist of formic aldehyd, 0.13% ; thymol, 

 0.1%; zinc oxid, 34.44% ; and starch, 65.27%. 

 If the formic aldehyd is omitted it may be used on 

 purulent sores. 



Formoguanamin (form-o-gwan'-am-in). Same as 

 Guanamin. 



Formomethylal (form-o-meth'-il-al). C 3 H 8 0. An 

 ethereal oil obtained from the distillation of a mixture 

 of methyl alcohol, sulfuric acid, and manganese per- 

 oxid. It is anesthetic. 



Formonetin {form-on' -et-in). C 2t H 22 7 . A dissoci- 

 ation product of ononin by action of ononin with hydro- 

 chloric or sulfuric acid. It is a crystalline substance, in- 

 soluble in water or ether. It gives a beautiful violet 

 with concentrated sulfuric acid and manganic oxid. 



Formonitril (form-o-ni'-tril). Hydrocyanic acid. 



Formopyrin [form-o-pi'-rin). A combination of anti- 

 pyrin with formic aldehyd ; white crystals soluble in 

 hot water, alcohol, and acids, melting at 156 C. 



Formose {form'-oz). A sweetish syrup obtained by 

 Loew on the condensation of formic aldehyd in the pres- 

 ence of bases. It consists of a mixture of a nonfer- 

 mentable sugar (formose) and a fermen table sugar 

 (rt-acrose), a hexose which is the starting-point of fur- 

 ther syntheses. 



Formula. (See Illus. Diet.) F., Brenner's. 1. See 

 Brenner's F. (Illus. Diet.). 2. With the same cur- 

 rent strength the cathodal closing contraction is four 

 times as strong as the cathodal opening contraction. 

 F., Dental, one showing the number and arrange- 

 ment of teeth. F., Glyptic, a chemic formula de- 

 signed to illustrate the structural and spatial conception 

 of the molecule. F., Magistral, F. magistralis, a 

 magistral prescription. F., Official, one given in an 

 official publication. F., Officinal, a pharmaceutic 

 formula which, though not official, is commonly fol- 

 lowed by pharmacists. F., Reuss', the formula by 

 means of which the amount of albumin contained in 

 pathologic exudates and transudates can be approxi- 

 mately calculated when the specific gravity that de r 

 pends upon the amount of albumin present is known: 

 E = Y% (S — 1000) — 2.8 ; E = percentage of albu- 

 min contained in the fluid ; S = specific gravity of the 

 fluid. F., Vertebral, one used to indicate the num- 

 ber and arrangement of the vertebrae. 



Formyl, Formylum. (See Illus. Diet.) Syn., For- 

 tnoxyl. 2. The trivalent radicle, CH //// . Syn., For- 

 tnylene. F.-amid. See Formamid. F. Bromid, 

 bromoform. F. Chlorid, F. Perchlorid, chloroform. 

 F.-phenetidin, C 9 H,,N0 2 , a substance obtained from 

 phenetidin hydrochlorate by action of formic acid with 

 anhydrous sodium formate ; it occurs in colorless crys- 

 tals, without odor or taste, soluble in alcohol, ether, 

 and hot water, melting at 6o° C. It is antiseptic. 

 Syn., Paraoxyethyl-formanilid. F.-piperidin, an 

 oily, aromatic liquid obtained by interaction of for- 

 mamid and piperidin; soluble in water and alcohol ; 

 boils at 221 C. F. Sulfid, sulfoform. F. Tribro- 



mid, bromoform. F. Trichlorid, chloroform. F. 

 Triiodid, iodoform. 



Fornical {for'-nik-al~). Relating to the fornix. 



Fornix. (See Illus. Diet. ) F. ascendens. See For- 

 nicolnmn (Illus. Diet.). F. centralis, F. cerebri. 

 See Fornix (1) (Illus. Diet.). Syn., Psalidium ; 

 Psalis. F. conjunctivae, a freely movable fold of 

 conjunctiva between the lids and the cornea. F. tri- 

 cuspidalis. See Fornix (1) (Illus. Diet.). F. 

 vaginae, F. of the Vagina. See under Vagina 

 (Illus. Diet.). Fornices vasculosi renum. See 

 A reus vasculosi renales. 



Fortoin [foS-to-in). See Formaldehyd-cotoin. 



Fossa. (See Illus. Diet.) F., Acetabular, F. ace- 

 tabuli, a depression in the center of the acetabulum. 

 F., Amygdaloid. See under Amygdaloid (Illus. 

 Diet.). F., Anconeal. See Olecranoid F. (Illus. 

 Diet.). F. anterior major (humeri). See F., Cof- 

 onoid. F. anterior minima (humeri), a slight de- 

 pression on the ventral aspect of the humerus which 

 receives the border of the head of the radius in ex- 

 treme flexion of the forearm. F., Anterior (of the 

 skull). See F., Precranial. F. anthelicis, F. of 

 the Anthelix, the depression between the crura of the 

 anthelix at its upper and anterior end. Syn., F. tri- 

 quetra ; F. navicularis auris ; F. triangularis ; 

 F. innominata. F. arcuata. See F. subarcuata. 

 Fossae articulares, prearticular processes of the atlas. 

 F. basilaris, a depression on the upper aspect of the 

 basilar process of the occipital bone. F., Biesiad- 

 ecki's, a peritoneal recess which is bounded in front 

 by a more or less well-defined fold, the inner surface 

 of which looks upward over the psoas toward the root of 

 the mesentery, the outer extending toward the crest of 

 the ilium. Syn., F. iliacosubfascialis. F., Brosike's, 

 a recess in the peritoneal cavity which is situated in 

 the first part of the mesojejunum and behind the supe- 

 rior mesenteric artery. Syn., Parajejunal fossa ; Ates~ 

 entericofarietal fossa. F., Buccal, an embryonic 

 fossa bounded by the inferior and superior branches 

 of the facial arches, which ends in a culdesac not con- 

 nected with the intestinal canal. F. caeca. See For- 

 amen, Cecal (Illus. Diet.). F. caecalis, a fold of 

 peritoneum forming a pouch upon the surface of the 

 right iliopsoas muscle and extending to the apex of 

 the cecum. F.s, Cerebellar, two shallow concave 

 recesses on the lower part of the inner surface of the 

 occipital plate for the reception of the hemispheres 

 of the cerebellum. Syn., Inferior occipital fossas. 

 F.s, Cerebral, two shallow concave recesses on the 

 upper part of the internal surfaie of the occipital 

 plate for the reception of the hemispheres of the cere- 

 brum. Syn., Superior occipital fossas. F. cerebralis 

 anterior, one of the precranial fossas. F. cerebralis 

 media, one of the mesocranial fossas. F. cerebralis 

 posterior, one of the postcranial fossas. F., Clau- 

 dius', a triangular space containing the ovary ; it is 

 bounded anteriorly by the round ligament, abo\ 

 the external iliac vein, and below by the ureter. S3 n., 

 Ovarian fossa. F. cochleae, F. cochlearis, a slight 

 depression in the petrosa receiving the base ol the 

 modiolus. F. cochleariformis. See Receptacle, 

 panic Tensor. F., Coronal. See /-'., Precranial, 

 F., Coronoid, F. coronoidea, a trilateral concave 

 depression into which the apex of the coronoid pro- 

 cess of the ulna fits in extreme flexion of the forearm. 

 F.s, Costal, Fossae costales, the facets on the 

 bodies of the vertebras where articulation occurs with 

 the heads of the ribs. F.s, Costotransverse, 

 pressions (usually three) on each side, upon the dorsal 

 aspect of the three upper segments of the sacrum, 

 F.s, Cranial. See F.s, Mesocranial, F.s, Precranial, 



