molecular cloud

noun

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

Nearby words

  1. molecular,
  2. molecular astronomy,
  3. molecular beam,
  4. molecular biology,
  5. molecular clock,
  6. molecular disease,
  7. molecular distillation,
  8. molecular film,
  9. molecular formula,
  10. molecular genetics

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012