noun
Etymology: ray (II)
: any of various chiefly marginal tracheids in the vascular rays of some gymnosperms that have bordered pits and lack living contents but resemble typical ray cells in position and shape
noun
Etymology: ray (II)
: any of various chiefly marginal tracheids in the vascular rays of some gymnosperms that have bordered pits and lack living contents but resemble typical ray cells in position and shape
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012