Sympathetic System (of nerves). That portion of the nervous system not belonging to the cerebro-spinal axis.
Sym´physis, n. A growing together; as, symphysis pubis, symphysis menti.
Synarthro´sis, n. Same as suture.
Synchondro´sis, n. Cartilaginous union or articulation.
Syndac´tyle or Syndac´tylous, a. Having two toes immovably coherent for a considerable distance.
Syngne´sious (foot), a. Same as syndactyle foot.
Syn´onym, n.; pl. syn´onyms or synon´yma. A different word of the same or similar meaning. Archæopteryx macrurus, Owen, is a synonym of Arch. lithographica, Meyer. Synonym is the converse of homonym, which is the same word, of different meanings. Thus, Sylvicola, Swainson, a bird, is a homonym of Sylvicola, Humphreys, a mollusk. (Also written synonyme.)
Synon´ymous, a. Expressing the same meaning in different terms. (Synonymical is also written, but rarely.) (Also written synonomous.)
Synon´ymy, n. A collection of synonyms. In this sense, synonymy is a burden and a disgrace to ornithology. Also, in the abstract, expression of the same meaning by different words. (Also written synonomy.)
Syno´via, n. The peculiar glairy fluid which lubricates joints. So, synovial fluid; synovial membrane.