Anat. Pl. -oses. [mod.L., a. Gr. συνάρθρωσις, f. σύν SYN- + ἄρθρωσις jointing, ARTHROSIS.] A form of articulation in which the bones are firmly fixed so as to be incapable of moving upon one another, as in the sutures of the skull and the sockets of the teeth: distinguished from AMPHIARTHROSIS and DIARTHROSIS.
1578. Banister, Hist. Man, 3 b. Not vnder the kynde of Diarthrosis, but Synarthrosis: for asmuch as the mouyng of these bones is most obscure.
1634. T. Johnson, Parey’s Chirurg., VI. xlii. (1678), 165. Synarthrosis, or Coarticulation,… hath … three kinds.
1841. R. E. Grant, Comp. Anat., 125. There are fewer immoveable synarthroses [in the amphibia and reptiles] than in birds and mammalia.
