noun🔗ShareAnimal rexAn animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking."My sister's pet rabbit is a rex; its fur is incredibly soft because it lacks the usual coarse outer hairs. "El conejo de mi hermana es un animal rex; su pelaje es increíblemente suave porque carece de los pelos exteriores ásperos habituales.animalbiologyorganismChat with AIVocabulary GamePractice Reading