GROIN 



534 



GUACIN 



Groin [origin obscure]. The depression between the 

 belly and the thigh. 



Groove (groov) [D., gropf, a channel]. A furrow or 

 channel. G., Auriculo-ventricular. See Furrow. 

 G., Bicipital, the deep groove on the anterior surface 

 of the humerus separating the greater and lesser tub- 

 erosities. G., Cavernous, a broad groove on the supe- 

 rior surface of the sphenoid bone lodging the internal 

 carotid artery and the cavernous sinus. G., Dental. 

 See Dental Groove. G., Infraorbital, the furrow at 

 the posterior portion of the superior maxillary bone on its 

 orbital surface, which finally develops into a canal of 

 the same name. G., Lachrymal, a groove in front 

 of the opening of the antrum, on the inner surface of 

 the superior maxillary bone. G., Medullary, a long 

 shallow furrow that appears along the dorsal line 

 of the neural tube of the embryo. G., Mylo-hyoid, 

 the groove on the inner surface of the inferior maxil- 

 lary bone running from the submaxillary fossa to the 

 inferior dental foramen. G., Nasal, the groove in 

 the nasal bone for the nasal nerve. G., Occipital, 

 the groove in the mastoid portion of the temporal 

 bone, that lodges the occipital artery. G., Optic, the 

 groove on the superior surface of the sphenoid bone 

 terminating on either side in the optic foramen. G., 

 Sacral, the channel on the back of the sacrum between 

 the spinous and transverse processes. G., Subcla- 

 vian, the longitudinal groove on the under surface of 

 the clavicle for the attachment of the subclavius mus- 

 cle. G., Spiral. See Sulcus spiralis. G., Verte- 

 bral, the groove running along the spine on each side 

 of the spinous process. 



Groping-test (grop'-ing-test). In ophthalmology, a 

 test for false orientation in paralysis of the ocular 

 muscles. The affected eye does not locate objects in 

 their true place, and if asked to point quickly at an 

 object the patient's finger will be carried to one side of 

 it. 



Gros Mai {gro-ma(k)l) [Fr.]. The well-marked form 

 of epilepsy ; major epilepsy. 



Gross {gros) \Y.,gros, great]. Coarse; great. G. 

 Anatomy, anatomy considered without reference to 

 histology or the details of minute structure. G. Ap- 

 pearances, macroscopic appearances. 



Grote's Test. See Tests, Table of. 



Grough, Grouph (gruf). See Gruff. 



Ground (grownd) [ME. , ground, ground]. The bot- 

 tom ; soil ; earth. G. Ivy, a popular name for Gaul- 

 theria procumbens. G. Laurel. See Trailing Arbu- 

 tus. G.-nut. See Apios. G.-nut Oil, peanut oil. 

 A fixed oil expressed from the embryo of the seed of 

 the peanut, Arachis hypogcza. It resembles olive-oil 

 in general properties, and for which it is often substi- 

 tuted. G. -water. See Subsoil-water. 



Groundseltree. See Baccharis. 



Grouse (grows) [OF., griesche, gray]. A bird of the 

 genus Tetrao. G. -berry, a popular name for Gaul- 

 theria procumbens. G. -disease, a disease that attacks 

 and destroys great numbers of red grouse (Lagopus sco- 

 ticus) of Europe ; it is believed to be due to the over- 

 stocking of its haunts and the propagation of the 

 species by depauperized parents. It is said by some 

 writers to be due to the presence of a parasite, Stron- 

 gylus pergracilis, in the bronchial passages. See Para- 

 sites (Animal), Table of. 



Grove Cell. See Cell. 



Grow (gro) [ME., gro7ven, to grow]. To increase by 

 a natural process of development. 



Growing (gro'-ing) [ME., growen, to grow]. In- 

 creasing in size. G. -fever, pyrexia associated with 

 rapid growth. G. -pains, a term applied to neuralgic 

 or rheumatic pains in the limbs occurring during 



youth, apparently of varied origin and character. 

 G. -point, in botany, the tissue immediately about the 

 apical cell ; the tip of the stem or other point where 

 cell-division is active ; the Punctum vegetationis. 



Growth (groth) [ME., growen, to grow]. I. The 

 augmentation of the body that takes place between in- 

 fancy and adult age. Also, the increase of any part of 

 the body by addition to the number of its cellular ele- 

 ments, without the production of structural abnormality 

 or differentiation into unlike tissues. 2. Any tumor 

 or adventitious structure. 



Grub [ME., grubben, to dig]. I. A dwarf. 2. See 

 Comedo. G.-in-the-head. See QLstrus ovis, under 

 Parasites (Animal), Table of. G. -worms. See 

 Comedo. 



Gruber's Experiment. An experiment for detecting 

 anomalies of tension in the ear-membrane. A mem- 

 brane already excessively tense will give no alteration 

 during Valsalva's experiment (a. v.), but if the mem- 

 brane has been previously unduly relaxed, Valsalva's 

 experiment will, according to Gruber, restore its ten- 

 sion, and the vibrating fork will be heard better by air- 

 conduction, and worse by bone-conduction than be- 

 fore or after. G.'s Gelatin Bougies, medicated al- 

 mond-shaped pieces of gelatin for insertion into the 

 auditory meatus. G.'s Method. I. A method of 

 washing out the tympana. Syringe the fluid into one 

 nostril with the other closed, the fluid entering the 

 tympana by way of the Eustachian tubes. 2. A 

 method of inflating the middle ear. The patient is 

 required to phonate at the moment the inflation-bag is 

 compressed. A short word, ending in a guttural con- 

 sonant, is advised, as " hie" or "hook." 



Gruel (gru f -el) [dim. of grutum, meal]. A decoction 

 of corn-meal or oat-meal boiled in water to a thick 

 paste. 



Gruff (gruf) [D. , grof coarse]. Any crude drug; 

 also the coarse part of a drug that will not pass through 

 a sieve ; the term is used also adjectively, as gruff 

 sulphur or saltpeter. 



Grume (groom) [grumus, a little heap]. A clot, as of 

 blood ; a thick and viscid fluid. 



Grumose (gru' -mos) [grumus, a little heap]. Same as 

 Grumous. 



Grumous (gru'-mus) \_grumus, alittleheap]. Knotted, 

 clotty, or in granular masses. Formed of coarse, 

 clustered grains. 



Grutum (gru f -tum) [grutum, grit]. A small, hard 

 tubercle of the skin, usually seen on the face, and due 

 to retention of sebaceous matter. It is also called 

 Miliary Tubercle and Pearly Tubercle. See Milium. 



Gruyere Cheese (gru-yar'). See Cheese. 



Gryposis (gri-po'-sis) \_ypvnuai(;, curvature]. Curvature. 

 See Arthrogryposis and Onychogryposis . 



Gscheidlen's Method. A method of preparing hemo- 

 globin crystals. Take defibrinated blood that In- 

 been exposed for 24 hours to the air, and keep it in a 

 closed tube of narrow caliber for several days at 37 

 C. When the blood is spread on glass the a 

 form rapidly. 



Gtt. Abbreviation of gulta, or gutter, drop, or drops. 



Guachamaca (gwaw-shaw-maw'-kah) [S. America]. 

 The bark of an apocynaceous tree. G. toxifera, 

 or Malouetia nitida, of S. America, furnish 

 virulent arrow-poison, somewhat resembling < : 

 it has been employed in tetanus and hydropb 

 Unof. 



Guachata, or Guachacata (gwaio-c/ia-f'-tali, or 



<haiv-kat'-ah) [Mex.]. The flowers of a Mexican 

 plant, containing several bitter tonic principles. I nof. 



Guacin (gwaw'-sin) \_guaco~\. A bitter resin from 

 guaco ; it is diaphoretic, stimulant, ami emetic. I nofc 



