From Longman Dictionary of Contemporary Englishtest-tube babyˈtest-tube ˌbaby noun [countable] HBHMBa baby that develops from an egg removed from a woman’s body, that is then put back inside the woman to continue developing
Examples from the Corpus
test-tube baby• She had asked for a test-tube baby because her fallopian tubes were irreversibly blocked.• Nearly one child in 80 born in Britain is a test-tube baby.• At one point we see a homunculus encased in a glass beaker, exactly like a test-tube baby.• Are we to understand you have made a test-tube baby?• What will happen. they ask, when the first defective test-tube baby is horn? 