zymoplastic substance
1substance — Stuff; material. SYN: substantia [TA], matter. [L. substantia, essence, material, fr. sub sto, to stand under, be present] alpha s. SYN: reticular s. (1). anterior perforated s. [TA] a region at the base …
2thromboplastin — A substance present in tissues, platelets, and leukocytes necessary for the coagulation of blood; in the presence of calcium ions t. is necessary for the conversion of prothrombin to thrombin, an important step in coagulation of blood. It is now… …
