ABDOMINO-ANTERIOR 



cavity of a few fishes with the urino-genital cloaca, 

 and employed in the outward transportation of the 

 generative products. A. Press. See Prelum Abdo- 



Abdominal Regions. 



minale. A. Reflex. See Reflexes, Table of. A. Re- 

 gions. See Abdomen. A. Respiration, R. carried 

 en chiefly by the diaphragm and abdominal muscles. 

 A. Ribs, transverse ossifications (dermal?) of the 

 abdominal wall of crocodiles and certain other reptiles. 

 A. Ring, External, a triangular opening in the fibers 

 of the aponeurosis of the external oblique muscle trans- 

 mitting the spermatic cord of the male and the round 

 ligament of the female. A. Ring, Internal, an oval 

 aperture in the fascia transversalis that transmits the 

 spermatic cord of the male and the round ligament of 

 the female. A. Scutella, the broad, belly scales of 

 serpents, so far as the anus. A. Section. See Celi- 

 otomy. A. Segments, the more or less evident trans- 

 verse divisions or somites of the abdomen in arthropods. 

 A. Typhus, Enteric Fever. A. Vertebrae, those 

 vertebra; in fishes, that give off ribs or processes arching 

 the visceral cavity. 



Abdomino-anterior (ab-dom' ' -in-o-an-te' '-re-or). Hav- 

 ing the belly forward (used of the fetus in utero). 



Abdomino-genital (ab-dom' -in-o-jeti' -it-al). Relating 

 to the alxlomen and the genitalia. A. Nerve, Inferior, 

 the ilioinguinal nerve. A. Nerve, Superior, the ilio- 

 hy|)ogastric nerve. 



Abdomino - hysterectomy (ab-dom' -in-o-his-ter-ek' - 

 to-me). Removal of the uterus through an abdominal 

 incision. 



Abdomino - hysterotomy (ab-dom' -in-ohis-tcr-of-o- 

 me). Hysterotomy through an abdominal incision. 



Abdomino-posterior (ab-dom' -in-o-pos-le' '-re-or). Hav- 

 ing tin- U-lly toward the mother's back (used of the 

 fetus in utero). 



Abdomino-scrotal (ab-dom' ino-skro' -tal). Relating 

 to tin- abdomen ■ad th<- scrotum. A. Muscle, the 

 cremaster muscle. 



Abdomino-thoracic (al> dom'-in-o tho-ras'-ik). Re- 

 lating to the abdomen and thorax. 



Abdomino - uterotomy (ah-iiom' -in-o-u-lcrol'-o me). 

 Ibdomino livs/, ro/owy. 



Abdomino-vesical {ab-dom' in o v^'-ik-al). Relating 

 to tin- ab do m en and the armor] bladder. A. Pouch, a 

 fold of the perit o neu m in which are compriaed the 

 urachal fossae. 



Abdominoscopy (at< do»i in , •.'■!:. >■/>,• ) [oMmm; 

 oiumriv, to examine]. Examination of the abdomen 



18 ABIES 



for diagnostic purposes, by inspection, palpation, meas- 

 urement, percussion, etc. 



Abdominous {ab-dom' -in-us) \_abdere, to hide]. Hav- 

 ing a large abdomen. 



Abduce (ab-dus') \_ab, away; ducere, to lead]. To draw 

 away, as by an abductor muscle. 



Abducens {ab-du'-senz) [L., "leading away"]. A 

 term applied to certain muscles, or their nerves, that 

 draw the related part from the median line of the body. 

 Also, the sixth pair of nerves supplying the external 

 recti of the eye. A. oculi. See Muscles, Table of. 



Abducent (ab-du' -sent). See Abducms. 



Abduct (ab-dukt') [ab, from ; ducere, t d draw] . To draw, 

 or cause to move, away from the median line, whether 

 of the body or of a limb. 



Abduction (ab-duk' -shuii) \ab, from ; ducere, to lead], 

 I . The withdrawal of a part from the axis of the body, 

 or of a limb. 2. The recession or separation from each 

 other of the parts of a fractured bone. 3. A. of the 

 Eyes, the power of the external recti, measured by 

 the maximum ability to preserve singleness of the 

 image with prisms placed bases toward the nose. It is 

 commonly from 6° to 8°. See, also Adduction. 



Abductor (ab-duk' -tor). Same as Abducens, a. v. A. 

 Auris. See Muscles, Table of. 



Abelmoschus (a-bel-mos'-kus) [Ar., 'fiabb-el-misk, a 

 grain of musk]. A genus of malvaceous plants. A. 

 esculentus furnishes the esculent known as gumbo, or 

 okra. A. mosc/iatus affords Ambrette, q. v., or musk- 

 seed, formerly used in medicine. Unof. 



Abepithymia (ab-ep-e-thi' -me-ah) \ab, from ; £Trc8v/i'ta, 

 longing]. I. A perverted longing, or desire. 2. Pa- 

 ralysis of the solar plexus (the diaphragm formerly was 

 regarded as the seat of the soul [Vvfios], and of the 

 desires). 



Abernethy's Operation. Reoperations, Table of. A. 

 Sarcoma, a form of spindle-celled vascular sar- 

 coma. 



Aberrant {ab-er'-ant) \_ab, from; errare, to wander]. 

 Deviating from the normal or regular type, in appear- 

 ance, structure, course, etc., e.g., the aberrant duct of 

 the testis or liver, aberrant arteries, etc. 



Aberration (ab-er-a' -shun) \ab, from; errare, to wander]. 

 Deviation from the normal; mental derangement; fetal 

 malformation ; vicarious menstruation ; escape of the 

 fluids of the body by any unnatural channel. In optics, 

 any imperfection of focalization or refraction of a lens. 

 A., Chromatic, the dispersion arising from unequal 

 refraction of light of different parts of the spectrum. The 

 violet rays being more refrangible than the red rays, are 

 brought to a focus nearer the lens, and the image is sur- 

 rounded by a halo of colors. A., Mental, a degree of 

 paranoia that may or may not amount to insanity. A., 

 Spherical, the excess of refraction of the peripheral 

 part of a convex lens over the central area, producing an 

 imperfect focus and a blurred image. 



Abesamum (ab-es' -am-um) [L.]. Wheel-grease; fat 

 charged with iron ; formerly used as a remedy. 



Abevacuation (ab-e-vak-u-a'-shun) [ab, from; evacua- 

 tion]. 1. A morbid evacuation ; an excessive or deficient 

 discharge. 2. The passage of matter from one organ 

 or cavity into another; metastasis. 



Abeyance (ab-a'-ans) [O. Fr., for " open-mouthed ex- 

 pectation"]. A suspension of activity, or of function ; 

 a state of suspended animation, or action. 



Abi (al/'-bc). See I.ucuma. 



Abiaba (alt be aid ball). See Lucuma. 



Abicum (ab'-ikum) [L..]. The thyroid cartilage. (Obs., 

 or rare.) 



Abies (a'be-lz) [L.]. A genus of coniferous plants, includ- 

 ing the hr, hemlock, and spruce A. balsamea, Silver 

 Fir, Halsam Fir, or Balm of Gilead, a tree of the nat. 



