of or associated with or requiring the use of the mind
an integer or a fraction
capable of being expressed as a quotient of integers
consistent with or based on or using reason
having its source in or being guided by the intellect (as distinguished from experience or emotion)
hard to pass through because of dense growth
slow to learn or understand; lacking intellectual acuity
permitting little if any light to pass through because of denseness of matter
having high relative density or specific gravity