any wallaby of the genus Petrogale, having a banded or striped coat, slender body, and long legs and feet, inhabiting caves and rocky areas in Australia.
noun 1. a fucoid seaweed growing on rocks exposed at low tide. noun 1. any of various seaweeds that grow on rocks exposed at low tide
noun 1. Norman, 1894–1978, U.S. illustrator. 2. a male given name. noun 1. Norman. 1894–1978, US illustrator, noted esp for magazine covers
- Rockwell hardness
noun See Rockwell scale
noun, Metallurgy. 1. a numerical expression of the hardness of a metal as determined by a test (Rockwell test) made by indenting a test piece with a Brale, or with a steel ball of specific diameter, under two successive loads and measuring the resulting permanent indentation.