noun
a sheet of vascular tissue separating the vascular bundles
• Syn: ↑medullary ray
• Hypernyms: ↑vascular tissue
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noun : a ray of cambial origin that occurs in the stele of many vascular plants and often separates the vascular bundles — see phloem ray, xylem ray; compare medullary ray
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Bot.
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.
[1665-75]
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vascular ray,
Botany. medullary ray.
Useful english dictionary. 2012.