plastid

plastid
1. One of the differentiated structures in cytoplasm of plant cells where photosynthesis or other cellular processes are carried on; plasid contain DNA and are self-replicating. SYN: trophoplast. 2. One of the granules of foreign or differentiated matter, food particles, fat, waste material, chromatophores, trichocysts, etc., in cells. 3. A self-duplicating viruslike particle that multiplies within a host cell, such as κ particles in certain paramecia. [G. plastos, formed, + -id]
- blood p. any basic, morphologic unit in the biologic composition of blood, e.g., an erythrocyte.

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plas·tid 'plas-təd n any of various cytoplasmic organelles of photosynthetic cells that serve in many cases as centers of special metabolic activities
plas·tid·i·al pla-'stid-ē-əl adj

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plas·tid (plasґtid) any of the specialized organelles in plant cells other than the nucleus and centrosome, such as chloroplasts.

Medical dictionary. 2011.

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Look at other dictionaries:

  • plastid — 1876, from Ger. plastid , from Gk. plastos molded, formed (see PLASTER (Cf. plaster)) + id (from Greek dim. suffix idion) …   Etymology dictionary

  • Plastid — Plas tid, Plastide Plas tide, n. [Gr. ?, ?, a creator.] 1. (Biol.) A formative particle of albuminous matter; a monad; a cytode. See the Note under {Morphon}. [Archaic] Haeckel. [1913 Webster] 2. (Bot.) any of several types of minute granules… …   The Collaborative International Dictionary of English

  • plastid — plastid. См. пластида. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • plastid — [plas′tid] n. [Ger plastiden (pl.) < Gr plastides, pl. of plastis, fem. of plastēs, molder < plassein, to form: see PLASTIC] any of several specialized protoplasmic structures occurring in the cytoplasm of some plant cells, in which starch …   English World dictionary

  • Plastid — Plastids are major organelles found in plants and algae. Plastids often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell s color. Plastids are also the site of manufacture and storage of… …   Wikipedia

  • Plastid — Übergeordnet Organell Untergeordnet Chloroplast Amyloplast C …   Deutsch Wikipedia

  • plastid — /plas tid/, n. Cell Biol. a small, double membraned organelle of plant cells and certain protists, occurring in several varieties, as the chloroplast, and containing ribosomes, prokaryotic DNA, and, often, pigment. [1875 80; < G Plastide < Gk… …   Universalium

  • plastid — plas•tid [[t]ˈplæs tɪd[/t]] n. hic (lab cbl) a small, double membraned organelle of plant cells and certain protists, occurring in several varieties, as the chloroplast, and containing ribosomes, prokaryotic DNA, and, often, pigment • Etymology:… …   From formal English to slang

  • Plastid transformation — is a method in the genetic engineering of plants. Instead of the nuclear DNA, the DNA in the plant s plastids, usually the chloroplasts, is modified. The major advantage of this technology is that in many plant species plastid DNA is not… …   Wikipedia

  • plastid inheritance — plastid inheritance. См. пластидная наследственность. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • plastid nucleus — plastid nucleus. См. пластидное ядро. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

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