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. 1  a relatively large printed card or sheet of paper, often illustrated, posted to advertise or publicize something; placard. 2  any relatively large piece of commercial art, often a photograph of a celebrity, pinup, etc. 3  a person who traveled by post, or rapidly.