Type your word below and click

Results for hydrogen

Definitions of hydrogen:

part of speech: noun

A light gas, producing water upon oxidation.

part of speech: noun

An odorless, colorless, tasteless element, gaseous at ordinary temperatures and pressure; symbol H, atomic weight 1. It is the lightest known substance, and the weight of one of its atoms is the unit of atomic weights. It is readily replaceable in many compounds by other elements or radicals, and this substitution of the hydrogen atoms in an acid forms a salt.

Usage examples for hydrogen:

  • A Russian chemist, Mendeleeff, drew up a table of the elements in illustration of this, grouping them in families, which seemed to point to hydrogen as the common parent, or ultimate constituent, of each. "The Story of Evolution", Joseph McCabe
  • If a deep marking is desired, in order that it may afterwards be filled with some pigment, a better result is obtained by the use of liquid commercial hydrofluoric acid, which is a solution of hydrogen fluoride in water. "A Handbook of Laboratory Glass-Blowing", Bernard D. Bolas
  • If, therefore, incandescence be not a condition of the sun's surroundings, then surely there may be no glowing metallic vapors, no hydrogen no iron, no sodium, no magnesium, no oxygen; those constituents of the sun envelope, so graphically described by the spectroscopists of the present day. "New and Original Theories of the Great Physical Forces", Henry Raymond Rogers

Word of the day


The leaves of Egyptian privet, Lawsonia inermis, used as a cosmetic and hair- dye. ...