ho·me·o·box gene (hō'mē-ə-bŏks') n. One of a group of genes with a shared nucleotide segment that are involved in the formation of bodily segmentation during embryologic development.
[homeo(tic gene), a type of developmental control gene in which it is found (from Greek homoiōsis, a being made like, resemblance, from homoioun, to make like, from homoios, like; see homeo-) + box1 (from the fact that its DNA sequence is short and when written can be enclosed by a box on paper).]