protoplasm


protoplasm
protoplasmic, protoplasmal, protoplasmatic /proh'toh plaz mat"ik/, adj.
/proh"teuh plaz'euhm/, n.
1. Biol. (no longer in technical use) the colloidal and liquid substance of which cells are formed, excluding horny, chitinous, and other structural material; the cytoplasm and nucleus.
2. Obs. the living matter of organisms regarded as the physical basis of life, having the ability to sense and conduct stimuli.
[1840-50; < NL protoplasma. See PROTO-, -PLASM]

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      the cytoplasm and nucleus of a cell. The term was first defined in 1835 as the ground substance of living material and, hence, responsible for all living processes. Advocates of the protoplasm concept implied that cells were either fragments or containers of protoplasm. The weakness of the concept was its inability to account for the origin of formed structures within the cell, especially the nucleus. Today the term is used to mean simply the cytoplasm and nucleus. The word protoplasm is somewhat unpopular in modern biology, although the term protoplasmic streaming is commonly used to describe the movement of the cytoplasm.

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Universalium. 2010.

Look at other dictionaries:

  • Protoplasm — is the living contents of a cell that are surrounded by a plasma membrane.cite book |author=Cammack, Richard; Teresa Atwood; Attwood, Teresa K.; Campbell, Peter Scott; Parish, Howard I.; Smith, Tony; Vella, Frank; Stirling, John |title=Oxford… …   Wikipedia

  • Protoplasm — Pro to*plasm, n. [Proto + Gr. ? form, fr. ? to mold.] (Biol.) The viscid and more or less granular material of vegetable and animal cells, possessed of vital properties by which the processes of nutrition, secretion, and growth go forward; the so …   The Collaborative International Dictionary of English

  • protoplasm — protoplasm. См. протоплазма. (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.

  • protoplasm — 1848, from Ger. Protoplasma (1846), used by German botanist Hugo von Mohl (1805 72), from Gk. proto first (see PROTO (Cf. proto )) + plasma something molded (see PLASMA (Cf. plasma)). The word was in Late Latin meaning first created thing, and… …   Etymology dictionary

  • protoplasm — ► NOUN Biology ▪ the material comprising the living part of a cell, including the cytoplasm, nucleus, and other organelles. DERIVATIVES protoplasmic adjective. ORIGIN Greek pr toplasma, from protos first + plasma (see PLASMA(Cf. ↑plasmic)) …   English terms dictionary

  • protoplasm — [prōt′ə plaz΄əm] n. [Ger protoplasma: see PROTO & PLASMA] a semifluid, viscous, translucent colloid, the essential living matter of all animal and plant cells: it consists largely of water, proteins, lipids, carbohydrates, and inorganic salts and …   English World dictionary

  • PROTOPLASM —    a name given to presumed living matter forming the physical bases of all forms of animal and vegetable life; the term is now superseded by the term bioplasm. See DR. STIRLING, AS REGARDS PROTOPLASM …   The Nuttall Encyclopaedia

  • protoplasm — protoplazma statusas T sritis augalininkystė apibrėžtis Gyvasis ląstelės turinys, apsuptas plazmalemos, eukariotų; tai branduolys su citoplazma. atitikmenys: angl. protoplasm rus. протоплазма ryšiai: sinonimas – bioplazma …   Žemės ūkio augalų selekcijos ir sėklininkystės terminų žodynas

  • protoplasm — noun Etymology: German Protoplasma, from prot + New Latin plasma Date: 1848 1. the organized colloidal complex of organic and inorganic substances (as proteins and water) that constitutes the living nucleus, cytoplasm, plastids, and mitochondria… …   New Collegiate Dictionary

  • protoplasm — n. [Gr. protos, first; plasma, formed or molded] Matter by which the phenomena of life are manifested …   Dictionary of invertebrate zoology


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