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Molecular cloud

a cool dense interstellar region composed of a wide variety of molecules, mainly hydrogen, plus some dust, in which stars are forming

a large and dense cloud of cold gas and dust in interstellar space from which new stars are formed

It is believed that the creation of newborn stars occurs exclusively within molecular clouds.


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    molecular disease n. A disease in which there is an abnormality in or a deficiency of a particular molecule, such as hemoglobin in sickle cell anemia.

  • Molecular-distillation

    noun, Chemistry. 1. a vacuum distillation in which the molecules of the distillate reach the condenser before colliding with one another. noun 1. distillation in which a substance is heated under vacuum, the pressure being so low that no intermolecular collisions can occur before condensation

  • Molecular electronics

    noun microelectronics; a branch of electronics dealing with microcircuits

  • Molecular-film

    noun, Physical Chemistry. 1. a film or layer one molecule thick. noun 1. another name for monolayer

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