General Science

  • noun any process that results in offspring that have combinations of genes different from those of either parent, e.g. the crossing-over and independent assortment of chromosomes during gamete formation


  • Assembly of neutral atoms from ions and electrons as old stars swell and cool


  • The process by which an electron which had jumped to the conduction band, to create an electron hole, returns to the valence band. This results in the electron hole recombining with said electron. This is accompanied by a release of energy, such as radiation. Also called electron-hole recombination.
  • The process by which a particle or object is formed by the combination of charged particles or objects. For example, the formation of a neutral molecule via the combination of a cation and an anion.