1) gerdâvardan (#), anbâštan (#); 2) gerdâmadan
Fr.: 1) collecter, réunir, accumuler, ramasser; 2) s'accumuler, se réunir
1a) To bring together into a one body or place.
From O.Fr. collecter, from L. collectus, p.p. of colligere "gather together," from → com- "together" + legere "to gather," cf. L. lignum "wood, firewood," lit. "that which is gathered"; cognate with Gk. legein "to say, tell, declare," from PIE *leg- "to pick together, gather, collect"
1) Gerdâvardan "to collect," from gerd "round; around,"
→ disk; alternatively, ultimately from PIE base
*ger- "to gather," cf. Iranian ger-, gor-, etc. "to gather,"
→ category, + âvardan "to bring,"
collect and collapse model
model-e anbâšt va rombeš
Fr.: modèle d'accumulation et d'effondrement
A → sequential star formation model involving → massive stars and → H II regions. The energetic ultraviolet photons from a massive star born in a → molecular cloud drive a spherical → ionization front radially outward from the star at a velocity much higher than the → sound speed in the cold neutral gas. The supersonic expansion of the H II region through the surrounding neutral gas creates a → shock front, sweeping up an increasingly massive and dense shell of cool neutral gas. This is the collect phase of the process in which the H II region simply acts like a snowplough. If the expansion of the H II region continues for long enough, the surface density of the shell increases to the point where the shell becomes self-gravitating. The shell is then expected to collapse and fragment. Individual fragments may then enter a non-linear collapse phase, possibly forming massive stars. This model was first proposed by Elmegreen & Lada (1977, ApJ 214, 725), who used a one-dimensional analysis. Whitworth et al. (1994, MNRAS, 268, 291) developed an analytical model for the collect and collapse process which predicts the fragmentation time, the size, number, and mass of the fragments (see also Elmegreen 1998, in ASP Conf. Ser. 148, Origins, eds. Woodward et al., p. 150 and references therein). → stimulated star formation, → triggered star formation.
Fr.: surface collectrice
Of an interferometric telescope made up of several mirrors, the hypothetical mirror created by the combination of the individual mirrors.
→ collect; → area.
gerdâvareš, gerdâvard, gerdâmad, gerdâyand (#)
1) The act or process of collecting.
Verbal noun from → collect.
Forming a whole; of or characteristic of a group taken together.
Fr.: comportement collectif
1) The whole behavior of a system of many interacting components,
which differs from that of the individual components. Some classical
examples are the → many-body problem,
→ phase transition, most of thermodynamic phenomena,
collective oscillations occurring in solids, etc. Physics dealt with collective
behavior much earlier than the term collective behavior was even coined.
collective star formation
diseš-e gerdâmdi-ye setâregân
Fr.: formation collective d'étolies
Formation of stars, especially → massive stars, in group as opposed to individual formation.
1) The principle of ownership of the means of production, by the state or the people.
1) Collective character.
The process of forming collectives or collective communities where property and resources are owned by the community and not individuals (TheFreeDictionary.com).
Verbal noun of → collectivize.
gerâmadidan, gerâdmad kardan
To organize (a people, industry, economy, etc.) according to the principles of → collectivism (Dictionary.com).
A device that collects: a solar energy collector; a dust collector.
From → collect + -or.