SEBUM 



1310 



SECTOR 



eases, as diabetes mellitus. It consists in a universal, 

 branny desquamation, especially over the trunk and 

 extremities. 



Sebum (se'-butn) [L.]. The secretion of the sebaceous 

 glands. See also Sevum. S. palpebrale, Lema : the 

 dried glandular secretion of the eyelids. S. praepu- 

 tiale, S. praeputii, smegma praeputii. 



Sec (sek) [Fr.]. Dry ; said of bloodless surgical opera- 

 tions. 



Secale (sek-a'-le) [L.]. Rye. S. cereale, common 

 rye ; rye-flour furnishes a nutritious bread. Alone 

 or mixed with bran it is used as an absorbent and 

 emollient application, and as a mush it is said to be 

 laxative. Carbonized Rye is used in tooth-powders. 

 S. cornutum. See Ergot. S. farina, rye-meal. 



Secalin (sek'-al-in). See Trimethylamin. 



Secamone (sek-am-o' -ne) [L.]. A genus of the Seca- 

 monece. S. emetica, a shrub of India ; the root con- 

 tains an acrid, emetic principle. 



Secernment, Secerning (se-sern'-ment, se-sern' -ing) 

 [secemere, to separate] . Secreting ; applied to the 

 function of a gland or a follicle. 



Secessio, Secessus (sc-sesh'-e-o, se-ses'-us). Defeca- 

 tion. 



Secohm (sek' -dm) [secundus, following ; ohni\. A 

 unit of electric self-induction. 



Second (sek' -mid) [secundus, next]. Next after the 

 first. S. Intention. See Healing. S. -sight. See 

 Clairvoyance. 



Secondaries (sek' '-un-da-rez) [secundus, second]. A 

 name sometimes applied to the secondary symptoms 

 of syphilis, in contradistinction from the primaries. 



Secondary (sek'-un-da-re) [secundarius~\. I. Follow- 

 ing, succeeding to a first. Subordinate in order of 

 time or development ; an induced or faradic electric 

 current. 2. In chemistry, a hydrocarbon having a 

 substituted radicle attached to a carbon atom which is 

 attached to two other carbon atoms. S. Amputa- 

 tion, consecutive amputation, or amputation done after 

 the subsidence of inflammatory symptoms. S. Cata- 

 ract. See Cataract. S. Dentine, dentine formed at a 

 later period than the rest of the dentine ; when the 

 pulp, for example, is converted into solid material and 

 no pulp-cavity remains the material so formed is called 

 " secondary dentine. " S. Hemorrhage. See Hemor- 

 rhage, Consecutive. S. Syphilis. See Syphilis. S. 

 Tertiary, those diatomic alcohols in which one mole- 

 cule of hydroxyl is attached to a carbon atom which 

 is attached to two other carbon atoms, and the other 

 molecule of hydroxyl is attached to a carbon atom 

 itself connected with three other carbon atoms. 



Secreta (se-kre'-tah) [secemere, to separate] . The sub- 

 stances secreted by a gland, follicle, or other organ ; 

 products of secretion. 



Secreting (se-kre'-ting) [secemere, to separate]. Ef- 

 fecting secretion]. S. Fringes, synovial fringes. 



Secretion ( se - kre' '- shun ) [secretio : pi. , Secretiones~\. 

 The natural function of certain organs of the body, 

 mainly the glands and follicles. It consists in the 

 separation and elaboration of fluid or semi-fluid sub- 

 stances differing according to the organ in which they 

 are secreted. Also, the substance secreted. S., Ana- 

 lytic, the saliva secreted by a submaxillary gland with 

 intact nerves, as distinguished from that which flows 

 from a gland which has had its nerves divided (Lang- 

 ley). S., Menstrual, menstrual blood. S., Paralytic, 

 the abnormal discharge from a gland after section of 

 its motor nerve. S., Sebaceous, sebum. S., In- 

 ternal, the secretion of an organ that is not excreted 

 or discharged, as, e.g., glycogen. 



Secretitious (se- kre -tish'-us ) [secretio, a. secretion]. 

 Of the nature of a secretion. 



Secretodermatosis (se-kre-to-der-mat-c/sis) [secretio, 

 a secretion ; 6'epjia, skin ; voaoq, disease]. An affec- 

 tion of the secretory apparatus of the skin. 



Secreto-motor (se-kre' '-to-vio' '-tor) [secretio, a secretion ; 

 motor, a mover]. Applied to nerves intermediating the 

 function of secretion. 



Secretory (se'-kre-tor-e) [secemere , to separate]. Per- 

 forming secretion ; applied to those glands or organs 

 that form or produce secretions. S. Fibers, cen- 

 trifugal nerve-fibers exciting secretion. 



Secretum (se-kre' -turn). See Secretion. 



Sectio (sek'-she-o) [L.]. Section. S. abdominis. See 

 Laparotomy and Celiotomy. S. agrippina, Cesarean 

 section. S. alta, high or supra-pubic section in lithot- 

 omy. S. alta subpubica, transverse section beneath 

 the pubic arch in lithotomy. S. anatomica, a dissec- 

 tion. S. bilateralis, bilateral cystotomy. S. cadav- 

 eris, an autopsy. S. caesarea, Cesarean section. S. 

 corneae, keratotomy. S. fistularum, section of the 

 tissues between the two openings of a complete anal 

 fistula. S. fraenuli praeputii, division of the preputial 

 frenum for the relief of penile curvature and premature 

 seminal emissions. S. franconiana, suprapubic cys- 

 totomy. S. hypogastrica, suprapubic cystotomy. 

 S. lateralis, lateral cystotomy. S. lecatiana, lithot- 

 omy done partly by incision and partly by dilatation 

 (Le Cat). S. legalis, a post-mortem examination 

 made by order or consent of the law. S. mediana, 

 median lithotomy. S. musculorum, myotomy. S. 

 nervorum, neurotomy. S. postrolandica, a tran- 

 section of the brain at the posterior margin of the 

 postcentral gyrus. S. praerolandica, a transverse 

 section of the brain at the anterior margin of the pre- 

 central gyrus. S. rectovesicalis, rectal cystotomy. 

 S. renalis, nephrotomy. S. rolandica, a tran 

 section of the cerebrum passing through the fissure of 

 Rolando. S. tendinum, tenotomy. S. urethralis, 

 urethrotomy. S. vaginalis, elytrotomy. S. vagino- 

 vesicalis, colpocystotomy. S. ventralis, suprapubic 

 cystotomy. S. vesicae felleae, cholecystotomy. S. 

 vesicalis, cystotomy. 



Section (sek' -shun) [secare, to cut]. Division by cut- 

 ting; also, the condition made thereby; dissec-) 

 tion ; post-mortem examination ; a cut or thin slice 

 made for histologic or anatomic study. S., Ab-! 

 dominal. See Celiotomy. S., Cesarean. See 

 rean Operation. S., Frontal, a longisection serving! 

 to divide the body into equal or unequal dorsal and 1 

 ventral parts. It is, therefore, approximately parallel 

 with the dorsal and ventral aspect of the body, 

 also Sagittal and Transection ; also Position an 

 rection, Table of Intrinsic Terms. S., Longitudinal \ 

 See Longisection and S. , Frontal. S., Optic, the] 

 appearance resulting from microscopic examination of 

 transparent or nearly transparent objects, when 

 plane below the upper surface of the object is in 

 S., Sagittal, a longisection parallel with the sa.^itta , 

 suture, and hence with the meson or median plane of 

 the body, and serving to divide the body into equal 01 

 unequal right and left parts. See also Medh 

 Frontal, and Transection ; also Position and Dv 

 Table of Intrinsic Terms. Ss., Segmentation 

 Segmentation. Ss., Serial, the arrangement, con | 

 secutively, of microscopic sections in the order it 

 which they are cut. S., Sigaultian. See S\ m 

 otomv. S., Transverse. See Transection. 



Sector (sek'-tor) [secare, to cut]. An area of a circl" 

 included between two radii and an are. Ss., Cranio 

 metric, sectors in circles having the punctum al. 

 vomerisasacenter. The frontal sector is that bou 

 by a radius to the punctum naso-frontale. and 

 which, if prolonged, would pass through the punctun 



