Prothallium Pro*thal"li*um, n.; pl. {Prothallia}. [NL.] (Bot.) Same as {Prothallus}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • fern — fernless, adj. fernlike, adj. /ferrn/, n. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a… …   Universalium

  • Fern — /ferrn/, n. a female given name. * * * Any of about 10,000–12,000 species (division Filicophyta) of nonflowering vascular plants that have true roots, stems, and complex leaves and reproduce by spores. Though ferns were once classified with the… …   Universalium

  • Prothallium — Pro*thal li*um, n.; pl. {Prothallia}. [NL.] (Bot.) Same as {Prothallus}. [1913 Webster] …   The Collaborative International Dictionary of English

  • prothallium — noun (plural prothallia) Etymology: New Latin, from pro + thallus Date: 1858 prothallus …   New Collegiate Dictionary

  • Prothallium — A prothallium, or prothallus (from Latin pro = forwards and Greek θαλλος ( thallos ) = twig) is usually a pteridophyte, i.e. spore bearing plant, (almost exclusively ferns) in gametophyte stage in the alternation of generations cycle.… …   Wikipedia

  • Lophosoria quadripinnata — ? Lofosoria cuadripinata …   Wikipedia Español

  • plant — plantable, adj. plantless, adj. plantlike, adj. /plant, plahnt/, n. 1. any member of the kingdom Plantae, comprising multicellular organisms that typically produce their own food from inorganic matter by the process of photosynthesis and that… …   Universalium

  • prothallium — prothallial, prothallic, prothalline /proh thal een, uyn/, adj. prothalloid, adj. /proh thal ee euhm/, n., pl. prothallia / thal ee euh/. 1. Bot. the gametophyte of ferns and related plants. 2. the analogous rudimentary gametophyte of seed… …   Universalium

  • prothallium — /proʊˈθæliəm/ (say proh thaleeuhm) noun (plural prothallia /proʊˈθæliə/ (say proh thaleeuh)) 1. the gametophyte of ferns, etc. 2. the analogous rudimentary gametophyte of seed bearing plants. Also, prothallus. {New Latin, from Greek pro pro 2 +… …   Australian English dictionary

  • prothallium — [prō thal′ēəs] n. pl. prothalli [prō thal′ēī΄] or prothalluses [prō thal′ē əm] n. prothallia [prō thal′ēə] [ModL < Gr pro , before + thallos, a shoot (< IE base * dhal , to bloom > Alb dal, to sprout) + IUM] Bot. a minute, flat, greenish …   English World dictionary

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