TERVALENCE 



1467 



TESTILL 



Structure, the union of carbon atoms with three other 

 carbon atoms. 



Tervalence (ter-va'-lens). Synonym of Trivalence. 



Tessellated (les'-el-a-ted) [tessellatus ; tessera, a square]. 

 Formed into little squares. Chequered Having 

 quadrangular arrange- 

 ment. T. Cells, the flat- 

 tened cells of pavement- 

 epithelium. 



Tessera {tes' -er-ah) [L.]. 

 The cuboid bone. 



Test [test urn , crucible, 

 trial]. In chemistry, a 

 characteristic reaction 

 which distinguishes any 

 one body from all others. 

 - >, the reagent for pro- 

 ducing a test. A Table 

 of Tests is appended, see 

 pages 146S— 1506. In 

 biology, a shell or hard, 



Mter covering. See Testa. 

 -breakfast, Ewald's, 

 of one roll and 

 e glass of water or a 

 cup of weak tea, without 

 milk or sugar. T. -glass, 

 a small, glass vessel used 

 in the chemic laboratory 

 for purposes of experi- 

 i mentation and investiga- 

 tion. T.-meal, a meal 

 given in order to test the 

 action of the gastric juices. 

 T.-m., Jaworski's, the 

 whites of two, hard-boiled 

 eggs and iobc.c. of water. 

 T. -paper, paper impreg- 

 nated with a chemic re- 

 1 agent, as litmus, and used 

 for detecting the presence 

 of certain substances 

 or conditions which cause 

 a change in the color of 

 the paper. See Litmus. 

 T.-spoon, a small spoon 

 with a spatula-shaped han- 

 dle, used in chemic exper- 

 iments. T.-tube, a cyl- 

 inder of thin glass closed 

 at one end, used in various 

 chemic procedures. T.- 

 types, letters or figures 

 of different sizes to test 

 acuteness of 



of, passage of the testes through the inguinal canal 



into the scrotum. T., Female, the ovaries. T. mu- 



liebris. See Ovaries. 

 Testibrachial (tes-tib-ra' '-ke-al) [testis, testicle ; bra- 



chium, arm]. Pertaining to the testibrachium. 



Testibrachium (tes-tib-ra' -ke-um) [testis, 

 testicle; brachium, arm]. The process 

 connecting the cerebellum with the tes- 

 tis of the brain ; the prepeduncle or 

 superior eras of the cerebellum. 

 7 Testicle (tes'-tik-l). See Testes. T., 

 Displaced, a testicle in an abnormal 

 situation, as in the pelvic cavity. T., 

 Inverted, a testicle which is so placed 

 in the scrotum that the epididymis is 

 attached to the anterior part of the 

 gland. T., Irritable, neuralgia of the 

 testicle, due to some demonstrable path- 

 ologic condition in or about the testi- 

 cle, or to a spasmodic contraction of the 

 cremaster muscle. T., Pulpy, medul- 

 lary sarcoma of the testicle. T., 



Left Testicle with Vessels and Duct. 

 (After Sappey.) 



1. Spermatic artery. 2 Spermatic veins. 3. 

 Branch of spermatic artery. 4. Globus 

 major of epididymis. 5. Hydatid of Mor- 

 gagni. 6. Outer wall of body of testis. 7. 

 Vas deferens, with deferential artery. 8. 

 Vein. 9. Vas deferens. 10. Body of epi- 

 didymis. 11. Digital fossa. 12. Vessels of 

 epididymis 13. Globus minor. 



Section of the Scrotum and Testicle. 

 Diagrammatic. (After Sappey.) 



1. Septum scroti. 2. Mediastinum testis. 

 3. Vas deferens. 4. Skin. 5. Darlos. 

 6. External spermatic fascia. 7. Cre : 

 masteric fascia. S. Parietal layer of 

 tunica vaginalis. 9. Internal spermatic 

 fascia and subperitoneal fascia. 10. Cavity 

 of tunica vaginalis. 11. Visceral layer 

 of tunica vaginalis. 12. Tunica albuginea. 

 13. Digital fossa. 14. Epididymis. 



vision. 

 Those most in use are Snellen's test-types, which, at 

 proper distances, subtend an angle of five minutes. 



Testa {tes'-tah) [L.: gen. , Testa] . A shell. In biology, 

 the outer coat or covering of the seed ; a test. T. 

 ovi. egg-shell ; T. praeparata, prepared oyster-shell ; 

 both antacid. See Calcium. 



Testaceous (tes-ta'-shus) [testa, a tile, a shell]. In 

 biology : (a) of or pertaining to a shell ; shelly ; (b) 

 the color of unglazed pottery, brick-red to orange- 

 yellow. 



Testectomy (tes-tek' -to-me) [testis, testis; kuTOfiTj, exci- 

 sion]. See Orchidectomy. 



Testes (test'-ez) [L.]. The two glandular bodies, 

 situated in the scrotum, that secrete the semen. They 

 He in the abdominal cavity in early fetal life, and 

 descend into the scrotum about the time of birth. T. 

 lin. See Corpora quadrigemina. T., Descent 





Scrofulous. Synonym of Tuberculous Orchitis. T., 

 Swelled. Synonym of Epididymitis. T., Syphil- 

 itic. Synonym of Syphilitic Orchitis. T., Unde- 

 scended, the condition in which one or both testicles 

 remain in either the pelvis or the inguinal canal. Cf. 

 Monorchid, and Cryptorchid. 



Testicond (tes'-tik-ond) [testis, testicle; condere, to 

 hide]. Having the testes undescended. 



Testicular (tes-tik' -u-lar) [testiculus, a testicle]. Per- 

 taining to a testicle. T., Therapy, the therapeutic 

 employment of an extract from the testicles. See 

 Organotherapy. 



Testiculate (tes-tik' -u-ldt) [testiculus, a testicle]. Hav- 

 ing testicles, or having the shape of a testicle. 



Testiculus {tes-tik' -u-lus) [L.: gen. ^nd pi. , Testiculi]. 

 A testicle. 



Testill (tes'-til) [testa, shell, tile]. See FrustuU. 



