medullary ray
noun Date: 1830 1. a primary tissue composed of radiating bands of parenchyma cells extending between the vascular bundles of herbaceous dicotyledonous stems and connecting the pith with the cortex 2. vascular ray

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • Medullary ray — may refer to: Medullary ray (anatomy), the middle part of the Cortical lobule Medullary ray (botany), characteristic radial sheets or ribbons extending vertically, found in woods This disambiguation page lists articles associated with the same… …   Wikipedia

  • medullary ray — n. 1. Anat. extensions of the kidney tubules into the cortical substance 2. Bot. strands of parenchymal tissue extending from the pith to the bark and separating the vascular bundles in the stems of certain plants (dicotyledons and gymnosperms) …   English World dictionary

  • medullary ray — noun a sheet of vascular tissue separating the vascular bundles • Syn: ↑vascular ray • Hypernyms: ↑vascular tissue * * * noun 1. : a ray of primary origin in the stele of various cryptogamous and dicotyledonous vascular plants that extends… …   Useful english dictionary

  • medullary ray — Bot. (in the stems of woody plants) one of the vertical bands or plates of unspecialized tissue that radiate between the pith and the bark. Also called pith ray. [1820 30] * * * …   Universalium

  • medullary ray — med′ullary ray′ n. bot a vertical band or plate of unspecialized tissue that radiates between the pith and the bark in the stems of woody plants • Etymology: 1820–30 …   From formal English to slang

  • medullary ray — /məˈdʌləri reɪ/ (say muh duluhree ray) noun (in the stems of exogenous plants) one of the vertical bands of plates of parenchymatous tissue which radiate between the pith and the bark …   Australian English dictionary

  • medullary ray —   Sheet of primary stem parenchyma tissue extending from the pith to the cortex …   Expanded glossary of Cycad terms

  • Medullary ray (anatomy) — In anatomy, the medullary ray is the middle part of the cortical lobule or renal lobule, consisting of a group of straight tubes to the collecting ducts. Their name is potentially misleading the medullary refers to their destination, not their… …   Wikipedia

  • Medullary ray (botany) — In botany, Medullary rays refer to a characteristic found in woods. In this context the term refers to radial sheets or ribbons extending vertically through the tree across and perpendicular to the growth rings. Also called pith rays or wood rays …   Wikipedia

  • ray — ray1 [rā] n. [OFr rai < L radius: see RADIUS] 1. a) any of the thin lines, or beams, of light that appear to come from a bright source b) a graphic representation of one of these, as in heraldry 2. a) any of several lines radiating …   English World dictionary

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