FONTICULUS 



267 



FORMIC 



under F.s, Lateral. F., Frontoparietal. See F., 

 Anterior (Illus. Diet.). F., Gerdy's, an abnormal 

 or supernumerary fontanel existing between the two 

 parietal bones at the point at which the sagittal suture 

 ceases to be serrated and becomes nearly rectilinear. 

 F., Great, F., Pulsatile, F., Sincipital. See F., 

 Anterior (Illus. Diet.). F.s, Lateral, two mem- 

 branous spaces, one in front between the parietal, 

 frontal, and temporal bones (the anterior lateral or 

 sphenoid fontanel ) and one behind between the parietal, 

 occipital, and temporal bones (the posterior lateral, mas- 

 toid, or Casser's fontanel). They usually disappear the 

 year after birth. F., Nasofrontal, an abnormal one 

 at the union of the nasal and frontal bones. F.. Oc- 

 cipital, F., Occipitoparietal, F., Posterior Median, 

 F., Small. See F., Posterior (Illus. Diet.). F., 

 Supraorbital, in comparative embryology, a cordate 

 membranous space between the occipital cartilage and 

 the skull. 



Fonticulus. (See Illus. Diet. ) 3. Same as Fontanel. 

 F. major, F. quadrangularis, the anterior fontanel. 

 F. minor, F. triangularis, the posterior fontanel. 



Foot. 1 See Illus. Diet. ) F., Friedrich's, pes cavus, 

 with hyperextension of the toes, observed in hereditary 

 ataxia. F., Morand's. See under Morand (Illus. 

 Diet). F., Splay-, talipes valgus. F. -switch 

 (Scheppegrell's), an appliance by means of which an 

 electric current may be controlled by means of the foot, 

 while the hands are engaged. F., Tabetic. 1. An 

 extension of the foot in preataxic tabes observed when 

 the patient is lying down. An affection of the foot in 

 the beginning of tabes described by Charcot and 

 marked by numbness and formication followed by 

 hypertrophy of the head of the astragalus, scaphoid, 

 cuneiform, and metatarsal bones. F., Weak, anterior 

 metatarsalgia. 



Forage (for'-aj) [OF., fourage\ Fodder. F. -poison- 

 ing, the preferred term for the so-called epizootic 

 cerebrospinal meningitis of horses. It is attributed to 

 a fungus upon the ensilage. 



Foramen. (See Illus. Diet.) F., Apical, the open- 

 ing at the end of the root of a tooth which admits its 

 vascular and neural supply to the dental pulp. F., 

 Bozzi's, the macula lutea. Foramina conjuga- 

 tions, the intervertebral foramina. F., Ferrein's. 

 See Fallopius, Hiatus of ( Illus. Diet. ). F., Galen's, 

 the opening of the anterior cardiac vein in the right 

 auricle. F., Interclinoid, Common, a canal formed 

 by an anomalous process connecting the anterior, 

 middle, and posterior clinoid processes of the sphenoid 

 bone. Foramina, Key and Retzius', Foramina, 

 Lushka's. See under Key (Illus. Diet. ). Foramina 

 repugnatoria. (See Illus. Diet. ) 2. Those through 

 which venomous serpents eject their poison. F., Sci- 

 atic, Inferior or Lesser. See F., Sacrosciatic, Small 

 (Illus. Diet.). Foramina, Stenson's, the incisive 

 foramina which transmit the anterior palatine vessels. 

 Foramina, Transverse Accessory, anomalous fora- 

 mina in the transverse processes of the cervical vertebrae 

 transmitting an inconstant accessory vertebral artery. 

 F.. Weitbrecht's, a fpramen in the capsule of the 

 shoulder-joint, through which the synovial membrane 

 communicates with the bursa lining the under surface 

 of the tendon of the subscapularis muscle. 



Foraminulate, Foraminulous, Foraminulose (for- 

 am-in'-u-ldt, -us, -os). Furnished with very minute 

 openings. 



Force. (See Illus. Diet.) F., Absolute Muscular, 

 the maximum capacity of shortening shown by a 

 muscle subjected to maximum stimulus. F., Animal, 

 according to the doctrine of Win, Cullen (1712-1790 , 

 the vis-vita or life-giving element ; an undefined dy- 



namic something (different from Hoffmann's ether or 

 Stahl's soul). Also called nerre-force, nerve-principle, 

 brain-energy. [Park.] F., Plastic, the generative 

 force of the body. 



Forceps. ( See Illus. Diet. ) F., Duck-bill, forceps 

 furnished with duck-bill-shaped beaks used for extrac- 

 tion of roots of teeth. F., Sequestrum, strong for- 

 ceps with serrated jaws of medium length ; they are 

 used for holding or removing the detached portion of 

 bone forming a sequestrum. 



Forcipal ( for'-sip-al). Relating to forceps. 



Fore. 1 See Illus. Diet. ) F. gilding, a term intro- 

 duced by Apathy to designate the histologic process of 

 treating perfectly fresh nerve-tissues with salts. Cf. 

 After-gilding. F.-type. See Archetype (Illus. Diet.). 



Formacoll yjomr'-ak-ol). Formaldehyd-gelatin. 



Formagen (form / -aj-en). A proprietary dental cement. 



Formal (form'-al). See Methylal (Illus. Diet.). 



Formalbumin (form-al'-bu-min). See Formaldehyd- 

 casein. 



Formaldehyd. (See Illus. Diet) Syn., Formal; 

 Formalin ; Formalose ; Oxymethylene. F. Acetate, 

 C 5 H g 4 , a heavy, colorless liquid, soluble in water; 

 boils at 170 C. It is antiseptic. F. Bisulfite, 

 H . COH . XajSjOj, an antiseptic. F. -casein, a 

 condensation-product of casein and formic aldehyd ; 

 a coarse yellow powder without odor or taste ; used as 

 a wound antiseptic. Syn., Formalbumin. F.-cotoin, 

 yellow crystals with odor of cinnamon, soluble in 

 alkalis. It is used in tuberculous diarrhea and in 

 chronic catarrh of the bowels. Dose, 4-8 gr. (o. 25-0. 5 

 gm.). Syn., Fortoin ; Methylenedicotoin. F. -gel- 

 atin, a combination of 2% of formic aldehyd added to a 

 warm aqueous solution of gelatin ; the resultant mass is 

 powdered and used as a surgical dressing. Syn., 

 Glutei. F., Para, (CHjO) 3 , obtained from formic 

 aldehyd by heat ; a white crystalline powder, soluble 

 in water; melts at 171 C. It is antiseptic and as- 

 tringent and used internally in cholera nostras and as a 

 surgical dressing. Dose, S-15 gr. (0.52-0.97 gm. ) 

 several times daily. Syn., Tri formal; Polynit rized 

 formic aldehyd. F. Sulfocarbolic Acid, 2;CH 2 - 

 OH) . C 6 H 3 . OH ; used as a wound antiseptic. 



Formalith (form'-al-ith). The proprietary name for 

 diatomaceous earth saturated with a solution of formic 

 aldehyd. 



Formalose (form' '-al-os). A 40^ solution of formic 

 aldehyd. 



Formamid ( ferm / -am-id). CH 3 XO. A clear, oily- 

 liquid obtained from ethyl formate by action of am- 

 monia ; sp. gr. 1. 146 at IQ° C. ; soluble in water; 

 boils at 200°-2I2° C, with partial decomposition. 

 Syn., Methane amid. 



Forman yform'-an\. See Ether, Chlermethyl-menthyl. 



Formate {form* -at). A salt of formic acid. 



Formation (form-a f -shun) [formare, to form]. A 

 thing formed or the process by which it is formed. F., 

 Claustral. F., Claustrum, Meynert's name for the 

 fifth layer of the cortex from the similarity of the cells 

 to those in the claustrum. Syn.. Claustral layer of the 

 eertbrecortex ; Fifth laver of the cortex cerebri ; For- 

 matio claustralis ; Spindle-cell formation. F., Gran- 

 ular, F., Granule-like, Meynert's name for the layer 

 of small, irregular cells composing the fourth stratum 

 of the cortex in the five-strata type. F., Granulose. 

 See Mernbrana granulosa (Illus. Diet.). F., New. 

 See Xeoplasm (Illus. Diet.). 



Formatol ( frm'-at-ol). A dusting-powder containing 

 formic aldehyd. 



Formes Frustes ( form-a froos-ta) [Fr.]. Incom- 

 plete forms of Graves' disease. 



Formic, Formicic ( form'-ik, form-is'-ik) [formica, 



