1. a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)

    Synonyms : atomic number 2, helium
    Type Of : inert gas, argonon, chemical element, element, noble gas
  2. the 5th letter of the Hebrew alphabet

    Type Of : alphabetic character, letter, letter of the alphabet