Breadcrumb Home > Dictionary Cite Meaning of test-tube baby Find definitions for: test'-tube ba'by Pronunciation: [key] an infant developed from an ovum fertilized in vitro and implanted into a woman's uterus, usually that of the biological mother. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. test tube test-tube skin Related Content Daily Word Quiz: persiflage Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language