Subs tanti a

(sub-stan’-she-ah) [L.]. Substance. S. cinerea, the gray matter of the nervous system. S. ferruginea. Synonym of Locus caruleus. S. fusc a. See Locus niger. S. gelati nos a, a peculiar gelatinous ti ue found in the spinal cord near the tip of the posterior horn. S. grise a, the gray matter of the spinal cord. S. nigra, the locus niger. S. propria, the e ential ti ue of a part; especially the middle layer (lamina propria) of the tympanic membrane. 606