SCHOOLCHILD

(plural -children), male schoolboy, female schoolgirl, [informal] schoolkid [noun] [C] - a child who goes to schoolI must say I find his schoolboy (= childish) humour rather tiresome.She's got a schoolgirl crush on (= she has strong romantic feelings for) one of her teachers.We just sat there giggling like naughty schoolchildren.As every schoolboy/schoolchild knows (= As everyone, including very young people, knows), the earth revolves around the sun.