This rare and uncertain noun appears in Job 39:19, where God asks Job if he clothed the horse's neck with this 'ra'mah.' Most interpreters understand it as the flowing, quivering mane that gives the warhorse its majestic appearance. The etymology is disputed, but the context of divine rhetorical questions about animal creation favors something visible and impressive. The Spanish 'crin' (mane) reflects the traditional interpretation, though the Hebrew meaning remains genuinely uncertain.