Rost ell i form

(rostel' -if-orni. Having the form of a rostel. atlas and axis, also the hip-joint and the shoulder joint. 2. A Swedish rotatory movement, by which the different joints are brought into motion within their natural limits. The aim is to lengthen and shorten the veins, so as to produce a sucking of their contents, thus stimulating the circulation and a isting the heart in its action. R. of Protoplasm, applied to f whole ma of protoplasm in the movement of °the a cell revolving on its own axis and carrying with it the grains and granules contained in it. Cf. (; R. -stage of Labor, one of the stages of labor, cor, sisting in a rotatory movement of the fetal head or other presenting part, whereby it is accommodated to the birth-canal. It may be internal, occurring before the birth of the presenting part, or external, occurring afterward.