In the process some of the mass of the hydrogen atoms is converted into energy in the form of light. The same process occurs in thermonuclear (fusion) bombs. In the Sun the process occurs in a controled manner.
â¢ POSTER CHILD (noun) The noun POSTER CHILD has 1 sense: 1. a child afflicted by some disease or deformity whose picture is used on posters to raise money for charitable purposes. Familiarity information: POSTER CHILD used as a noun is very rare.
Poster Board Basics. Basic, standard poster board is 22 inches high, 28 inches wide, and it may be glossier on one side than the other. It is sold in shades from white to black and numerous colors in between, even fluorescent shades.