vascular ray
noun Date: circa 1673 a band of usually parenchymatous cells partly in the xylem and partly in the phloem of a plant root or stem that conducts fluids radially and appears in a cross section like a spoke of a wheel

New Collegiate Dictionary. 2001.

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  • vascular ray — n. MEDULLARY RAY (sense 2) …   English World dictionary

  • vascular ray — noun a sheet of vascular tissue separating the vascular bundles • Syn: ↑medullary ray • Hypernyms: ↑vascular tissue * * * noun : a ray of cambial origin that occurs in the stele of many vascular plants and often separates the vascular bundles see …   Useful english dictionary

  • vascular ray — vas′cular ray′ n. bot medullary ray • Etymology: 1665–75 …   From formal English to slang

  • vascular ray — 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] * * * …   Universalium

  • vascular tissue — noun tissue that conducts water and nutrients through the plant body in higher plants • Hypernyms: ↑plant tissue • Hyponyms: ↑stele, ↑cambium, ↑vascular bundle, ↑vascular strand, ↑fibrovascular bundle, ↑ …   Useful english dictionary

  • ray — ray1 raylike, adj. /ray/, n. 1. a narrow beam of light. 2. a gleam or slight manifestation: a ray of hope. 3. a raylike line or stretch of something. 4. light or radiance. 5. a line of sight. 6. Physics, Optics. a …   Universalium

  • ray — I. noun Etymology: Middle English raye, from Anglo French raie, from Latin raia Date: 14th century any of an order (Rajiformes) of usually marine cartilaginous fishes (as stingrays and skates) having the body flattened dorsoventrally, the eyes on …   New Collegiate Dictionary

  • Vascular endothelial growth inhibitor — (VEGI) is an anti angiogenic [ [http://www.ihop net.org/UniPub/iHOP/gs/95120.html Hoffmann, R., Valencia, A. A gene network for navigating the literature. Nature Genetics 36, 664 (2004)] ] protein. It belongs to tumor necrosis factor (ligand)… …   Wikipedia

  • Ray|naud's disease — «ray NOHZ», a primary disorder of the vascular system, characterized by spasms and cyanosis of the extremities, especially in the fingers and toes, due to the obstruction of blood supply and local asphyxia. ╂[< M. Raynaud, 1834 1881, a French… …   Useful english dictionary

  • Vascular cambium — NOTOC The vascular cambium is a lateral meristem in the vascular tissue of plants. The vascular cambium is the source of both the secondary xylem (inwards, towards the pith) and the secondary phloem (outwards), and is located between these… …   Wikipedia

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