Definition of ruel-bone in English:

ruel-bone

noun

  • Ivory, probably from the tusk of a walrus or narwhal; = "ruel"; (also) a piece of ivory. Hence occasionally as adjective: made of this. Now archaic and literary.

Origin

Middle English; earliest use found in Gregorius. From ruel + bone.

Pronunciation

ruel-bone

/ˈruːəlbəʊn/