vascular ray

noun

, Botany.

1. a radiate band of parenchyma in the secondary xylem extending into the secondary phloem of the stems of certain vascular plants, formed by the cambium and serving for the storage of food and the conduction of nutriments.

vascular ray

noun

1. See medullary ray
   another name for medullary ray

Word History and Origins

Origin of vascular ray¹

First recorded in 1665–75