Re´lax-a´´tion. 1. A lessening of tension. 2. A mitigation of pain.

Re´nal. Pertaining to the kidney.

Res´ti-tu´´tion. 1. An act or process of restoration. 2. The rotation of the presenting part of the fœtus outside of the vagina.

Re´tro-gres´´sive. Going or moving backward. Passing from a better to a worse condition.

Re´tro-ver´´sion. The tipping of an entire organ backward.

Rick´ets. (Ra-chi´tis.) A constitutional disease of childhood in which the bones become soft and flexible from retarded ossification, due to deficiency of the earthy salts.

Ro-ta´tion. The process of turning around an axis.

Rough´en-ing. Any rough, coarse food that gives bulk to the intestinal contents without much nutrition.

Ru´be-fa´´ci-ent. An agent that reddens the skin.

Ru´gæ. Wrinkles or folds.