Aphotic region Aphotic region (Phytogeog.) A depth of water so great that only those organisms can exist that do not assimilate., Hypochondriac Hy`po*chon"dri*ac, a. [Gr. ? affocated in the hypochondrium: cf. F. hypocondriaque, formerly spelt hypochondriaque.] 1. Of or pertaining to hypochondria, or the hypochondriac regions. 2. Affected, characterized, or produced, by hypochondriasis. Hypochondriac region (Anat.), a region on either side of the abdomen beneath the cartilages of the false ribs, beside the epigastric, and above the lumbar, region., Hypogastric Hyp`o*gas"tric, a. [Cf. F. hypogastrique. See Hypogastrium.] (Anat.) Of or pertaining to the hypogastrium or the hypogastric region. Hypogastric region. (a) The lower part of the abdomen. (b) An arbitrary division of the abdomen below the umbilical and between the two iliac regions., Iliac Il"i*ac, a. [Cf. F. iliaque. See Ileum, and cf. Jade a stone.] 1. (Anat.) Pertaining to, or in the region of, the ilium, or dorsal bone of the pelvis; as, the iliac artery. [Written also ileac.] 2. See Ileac, 1. [R.] Iliac crest, the upper margin of the ilium. Iliac passion. See Ileus. Iliac region, a region of the abdomen, on either side of the hypogastric regions, and below the lumbar regions., Lumbar Lum"bar, Lumbal Lum"bal, a. [L. lumbus loin. See Loin.] (Anat.) Of, pertaining to, or near, the loins; as, the lumbar arteries. Lumbar region (Anat.), the region of the loin; specifically, a region between the hypochondriac and ilias regions, and outside of the umbilical region., Ophthalmic Oph*thal"mic, a. [Gr. ?: cf. F. ophthalmique. See Ophthalmia.] (Anat.) Of, pertaining to, or in the region of, the eye; ocular; as the ophthalmic, or orbitonasal, nerve, a division of the trigeminal, which gives branches to the lachrymal gland, eyelids, nose, and forehead. Ophthalmic region (Zo["o]l.), the space around the eyes., Parotic Pa*rot"ic, a. [See Parotid.] (Anat.) On the side of the auditory capsule; near the external ear. Parotic region (Zo["o]l.), the space around the ears., Regional Re"gion*al (-al), a. Of or pertaining to a particular region; sectional., Scapular Scap"u*lar, a. [Cf. F. scapulaire. Cf. Scapulary.] Of or pertaining to the scapula or the shoulder. Scapular arch (Anat.), the pectoral arch. See under pectoral. Scapular region, or Scapular tract (Zo["o]l.), a definite longitudinal area over the shoulder and along each side of the back of a bird, from which the scapular feathers arise., Transregionate Trans*re"gion*ate, a. [Pref. trans- + region.] Foreign. [Obs.] --Holinshed., Umbilical Um*bil"ic*al, a. [Cf. F. ombilical. See Umbilic, n.] 1. (Anat.) Of or pertaining to an umbilicus, or umbilical cord; umbilic. 2. Pertaining to the center; central. [R.] --De Foe. Umbilical cord. (a) (Anat.) The cord which connects the fetus with the placenta, and contains the arteries and the vein through which blood circulates between the fetus and the placenta; the navel-string. (b) (Bot.) The little stem by which the seeds are attached to the placenta; -- called also funicular cord. Umbilical hernia (Med.), hernia of the bowels at the umbilicus. Umbilical point (Geom.), an umbilicus. See Umbilicus, 5. Umbilical region (Anat.), the middle region of the abdomen, bounded above by the epigastric region, below by the hypogastric region, and on the sides by the lumbar regions. Umbilical vesicle (Anat.), a saccular appendage of the developing embryo, containing the nutritive and unsegmented part of the ovum; the yolk sac. See Illust. in Appendix.