protoxylem
noun Date: 1887 the first-formed xylem developing from procambium and consisting of narrow cells with annular, spiral, or scalariform wall thickenings

New Collegiate Dictionary. 2001.

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  • protoxylem — [prōt΄ō zī′ləm, prōt΄ō zī′lem΄] n. Bot. the first formed xylem of a root or stem, produced by the differentiation of the procambium …   English World dictionary

  • protoxylem — |prōd.(ˌ)ō+ noun Etymology: prot + xylem : the first part of the primary xylem that differentiates from the procambium and that is distinguished from the metaxylem by smaller diameter and the annular, spiral, or occasionally scalariform wall… …   Useful english dictionary

  • protoxylem — /proh teuh zuy leuhm, lem/, n. Bot. the part of the primary xylem that develops first, consisting of narrow, thin walled cells. [1895 1900; PROTO + XYLEM] * * * …   Universalium

  • protoxylem — noun The first xylem to form in a plant …   Wiktionary

  • protoxylem — pro·to·xylem …   English syllables

  • protoxylem — pro•to•xy•lem [[t]ˌproʊ təˈzaɪ ləm, lɛm[/t]] n. bot the part of the primary xylem of a plant that develops first, consisting of narrow, thin walled cells …   From formal English to slang

  • protoxylem — /proʊtəˈzaɪləm/ (say prohtuh zuyluhm) noun the part of the primary xylem that develops first, consisting of narrow, thin walled cells. {proto + xylem} …   Australian English dictionary

  • protoxylem point — noun : the protoxylem strand in cross section …   Useful english dictionary

  • protoxylem strand — noun : a group of protoxylem elements forming a longitudinal strand in the stele …   Useful english dictionary

  • Xylem — Multiple cross sections of a flowering plant stem showing primary and secondary xylem and phloem[1] Xylem is one of the two types of transport tissue in vascular plants. (Phloem is the other). The word xylem is derived from the Classical Greek… …   Wikipedia

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