- SYN: calcar. [A.S. spora]- calcarine s. [TA] the lower of two elevations on the medial wall of the posterior horn of the lateral ventricle of the brain, caused by the depth of the calcarine sulcus. SYN: calcar avis [TA], Haller unguis, hippocampus minor, minor hippocampus, Morand s., unguis avis.- Fuchs s. epithelial outgrowth of the dilator muscle of the pupil about midway in the breadth of the sphincter; part of the insertion of the dilator muscle onto the iris sphincter.- Grunert s. epithelial outgrowth of the dilator muscle of the pupil at the junction of the iris and the ciliary body; part of the origin of the iris dilator muscle.- heel s. bony thickening of the flexor surface of the calcaneus associated with severe pain on standing.- Michel s. epithelial outgrowth of the dilator muscle of the pupil at the peripheral border of the sphincter; part of the insertion of the dilator muscle onto the iris sphincter.- scleral s. [TA] circular ridge of sclera on the internal aspect of the corneoscleral junction; on cross-section, it appears as a hook-like process deep to the scleral venous sinus; relatively rigid, it provides attachment (origin) of the meridional fibers of the ciliary body. SYN: calcar sclerae [TA], scleral roll.- vascular s. partial septum between vessels (arteries and veins) at the level of fusion or branching at acute angle. SEE ALSO: calcar (1).
* * *spur 'spər n a sharp and esp. bony outgrowth (as on the heel of the foot)spurred 'spərd adj
* * *n.a sharp projection, especially one of bone.
* * *(spur) 1. a pointed projection; called also calcar. 2. in dentistry, a piece of metal projecting from a plate, band, or other dental appliance.
Medical dictionary. 2011.