rorqual definition by Webster's New World
Origin: French ; from Norwegian röyrkval ; from Old Norse reytharhvalr ; from reythr, rorqual (prob. akin to rautha ; from Indo-European base an unverified form reudh-, red) plush hvalr, whale: hence literally , red whale, from the reddish streaks in the skin
rorqual definition by American Heritage Dictionary
Origin: French, from Norwegian rørhval, from Old Norse reydharhvalr : reydhr, rorqual (from raudhr, red; see reudh- in Indo-European roots) + hvalr, whale.