FORNICATION 



491 



FOUR 



Fornication {fir-nik-a' 'shun) [fornicari, to forni- 

 cate]. The illicit sexual intercourse of an unmarried 

 person of either sex with another, whether married or 

 not. 



Fornicolumn {fir' ' -ne-kol-uni) [fornix, an arch ; col- 

 umna, a column] . The anterior pillar of the fornix, 

 one in each hemicerebrum. It is a bundle of fibers 

 ascending from the albicans and thalamus, passing 

 just caudad of the precommissure, forming the cephalic 

 boundary of the porta, and ending in the temporal lobe. 



Fornicommissure {for-ne-kom' -is-shilr) [fornix, an 

 arch; commissura, a commissure]. A lamina of 

 greater or less thickness uniting the two hemifornices 

 of the brain. It is not a true commissure, nor even 

 fibrous in structure. 



Fornicrista {for-ne-kris' -tah ). See Crista. 



Fornix (fir'-niks) [fornix, an arch]. I. An arched 

 portion of the brain composed of the two hippocamps 

 and their respective fimbrias, united across the meson 

 by a thin lamina, the forni commissure. 2. In biol- 

 ogy, a vaulted or arched arrangement or appendage, 

 as, for example, the scales in the throat of some 

 corollas, or the hollow beneath the umbo of a bi- 

 valve shell. F. descendens. See Bundle of Vicq 

 d ' Azyr. 



Forster's Method. See Cataract, Artificial Matura- 

 tion of. F.'s, Operation. See Operations, Table of. 



Fortification Spectrum {fir-tif-ik-a' -shun spek* -trum). 

 Teichopsia ; the appearance of a peculiar subjective 

 visual sensation in migraine. The luminous shape of 

 its outer edge assumes a zigzag form, with angles like 

 those of a fortification. 



Fosforus ( fos'-for-us). A commendable orthography 

 for phosphorus. It has been recommended for adop- 

 tion by recent spelling-reformers. 



Fossa \fos f -ah) [fossa, a ditch : pi., Fossa]. A de- 

 pression, furrow, or sinus. F., Canine, the depression 

 on the external surface of the superior maxillary bone, 

 giving rise to the origin of the levator anguli oris and 

 compressor nasi muscles. F., Condyloid, a fossa 

 behind each condyle of the occipital bone. F. coro- 

 naris, the boundary between the disc and corona, in 

 Medusa:. F., Cranial, any fossa of the skull. F., 

 Digastric, a deep groove on the inner aspect of the 

 mastoid process for the attachment of the digastric 

 muscle. F., Digital, a deep depression at the base 

 of the inner surface of the great trochanter of the femur. 



IF., Glenoid, the fossa in the temporal bone that receives 

 the condyle of the lower jaw. F., Hyaloid, a depres- 

 sion in the anterior surface of the vitreous body for the 

 crystalline lens. F. , Hyoid, a small cavity external 

 to the ary-epiglottic fold on either side of the larynx. 

 It is also called the Sinus piriformis. F., Iliac, the 

 smooth internal surface of the ilium. F., Incisive, 

 a depression in the superior maxillary bone just above 

 the incisor teeth. F., Infraclavicular. See F., 

 Mohrenheim 1 s. F. innominata. Same as F. sca- 

 phoidea. F. , Jugular, a deep excavation in the pe- 

 trous portion of the temporal bone, forming part of the 

 posterior lacerated foramen. F. lachrymalis, the de- 

 pression in the frontal bone for the reception of the 

 lachrymal gland. F., Lenticular. Same as F., 

 Hyaloid. F., Mohrenheim's, the infraclavicular 

 fossa ; a triangular depression beneath the clavicle. 

 F., Myrtiform. Same as F., Incisive. F., Nasal, 

 the nostrils. See A T asal Fossa. F. navicularis, 

 Morgagni's fossa, a fossa within the penis, formed by 

 a dilatation in the spongy portion of the urethral pas- 

 sage. F.. Occipital, a fossa behind the condyle of 

 the occipital bone. F., Olfactory, the fossa in the 

 fetus that develops into the nasal fossa. F. ovalis, 

 an oval depression in the right auricle of the heart. F., 





Palatine, the anterior palatine canal passing through 

 the palatine process of the superior maxillary bone. It 

 branches into four compartments, the foramina of Sten- 

 sen, and the foramina of Scarpa. F. patellaris, a de- 

 pression on the anterior aspect of the vitreous humor in 

 which rests the posterior surface of the lens. F., 

 Pituitary, a depression below the olivary process of 

 the sphenoid bone lodging the pituitary body. F., 

 Prepontile, the anterior foramen caecum. See Fora- 

 mina, Table of F., Pterygoid, the notch separating 

 the external and internal plates of the pterygoid pro- 

 cess of the sphenoid. F. of Rosenmuller, a depres- 

 sion on the posterior wall of the naso-pharynx immedi- 

 ately behind the Eustachian orifice. F. scaphoidea, 

 the curved depression between the helix and antihelix 

 of the external ear. F. sigmoidea, a deep groove on the 

 internal surface of the mastoid portion of the temporal 

 bone into which the mastoid foramen opens. F., Sphe- 

 no-maxillary, a triangular space at the angle of the 

 spheno-maxillary and pterygo-maxillary fissures. F., 

 Sublingual, a depression on the internal surface of the 

 inferior maxillary bone, for containing the sublingual 

 gland. F., Submaxillary, the oblong depression on 

 the internal surface of the inferior maxillary bone, 

 which contains the submaxillary gland. F., Sub- 

 scapular, a broad cavity on the internal surface of 

 the scapula. F. , Temporal, the fossa on either side of 

 the head filled by the temporal muscle. It is formed 

 by parts of the frontal, sphenoid, parietal, temporal, 

 and malar bones. F., Trochanteric. Same as F. , 

 Digital. F., Zygomatic, a cavity below and on the 

 inner side of the zygoma. 



Fosset, or Fossette {fos-et') [Fr.]. A dimple or small 

 depression. 



Fossilin {fis f -il-in) [fossilis, dug up]. A trade-name 

 for a product resembling vaselin. 



Fossula {fos'-su-lah) [dim. of fossa, a ditch : pi., Fos- 

 sula~\. I. In biology, a small fossa. 2. Any one of 

 the numerous slight depressions on the surface of the 

 cerebrum. F. olfactoriae, the olfactory depressions 

 of acraspede medusae. 



Fothergill's Disease, or Faceache. See Diseases, 

 Table of. F.'s Sore-throat, a synonym of the angi- 

 noid variety of scarlet fever [Scarlatina anginosd). 



Foubert's Test. See Death. 



Foudroyancy (foo-droi' '-an-se) [Fr.]. The property of 

 being foudroyant. 



Foudroyant {fio-droi r -ant) [Fr.]. Sudden and over- 

 whelming ; fulminant ; fulgurant. 



Foul (fi-zel) [yiE., foul, foul]. Filthy; offensive; dis- 

 gusting. F.-in-the-foot. See F.-rot. F.-rot, an 

 inflammatory disease of the hoofs of cattle ; it is at- 

 tended with suppuration. 



Foulage {fio-lahzh') [Fr., " fulling, or pressing"]. In 

 massage, a form of manipulation of the tissues. See 

 Fulling. 



Foulbrood {fowl' '-brood) . A contagious zymotic dis- 

 ease of the honey-bee and its larva, due to the 

 presence of the Bacillus alvei. See Bacteria, Syno- 

 nyrnatic, Table of. 



Foullioy's Operation. See Operations, Table of. 



Founder {fown'-der) [fundere, to pour]. Laminitis 

 {(/. v.) of the horse's fore-feet, with the accompanying 

 disorders of related parts. F., Chest, founder in a 

 horse, marked or accompanied by atrophy of the chest- 

 muscles. 



Foundling {found' -ling) [Ger. , funden, found]. An 

 abandoned infant. 



Four {fir) [~SlY..,feowur, four]. Twice two. F.-drug 

 Ointment. See Basilicon Ointment. F. Masters, 

 Suture of the. See Suture. F. -tailed Bandage. See 

 Bandage. 



