REGISTER n. 16 definitions
A stop or set of pipes in an organ. Parish register, A book in which are recorded the births, baptisms, marriages, deaths, and burials in a parish.
REGULATOR n. 4 definitions
uthority, undertakes to preserve order and prevent crimes; also, sometimes, one of a band organized for the comission of violent crimes. [U.S.] A few stood neutral, or declared in favor of the Regulators. Bancroft.
RETROGRESSION n. 2 definitions
Backward development; a passing from a higher to a lower state of organization or structure, as when an animal, approaching maturity, becomes less highly organized than would be expected from its earlier stages or known relationship. Called also retrograde development, and regressive metamorphism.