any of various tropical American plants belonging to the genus Sinningia, of the gesneria family, including the gloxinia and other species cultivated as houseplants for their variously colored flowers.
1. a combining form representing sinus, in compound words: sinorespiratory. 1. a combining form meaning “Chinese”: Sino-Tibetan; Sinology. combining form 1. Chinese: Sino-Tibetan, Sinology
sinoatrial si·no·a·tri·al (sī’nō-ā’trē-əl) or si·nu·a·tri·al (sī’nōō-ā’trē-əl, -nyōō-, sĭn’yōō-) adj. Abbr. S-A Relating to the venous sinus and the right atrium of the heart.
- Sinoatrial block
sinoatrial block n. Failure of an impulse to leave the sinoatrial node. Also called sinoauricular block, sinus block.
[sahy-noh-ey-tree-uh l, sahy-] /ˈsaɪ noʊˈeɪ tri əl, ˌsaɪ-/ noun, Anatomy. 1. a small mass of tissue in the right atrium functioning as pacemaker of the heart by giving rise to the electric impulses that initiate heart contractions. sinoatrial node n. Abbr. SAN A small mass of specialized cardiac muscle fibers located in the posterior wall […]