segment -
one of the parts into which something naturally divides; "a segment of an orange"
part,
piece something less than the whole of a human artifact; "the rear part of the house"; "glue the two parts together"
metamere,
somite one of a series of similar body segments into which some animals are divided longitudinally
sarcomere one of the segments into which a myofibril is divided
section one of several parts or pieces that fit with others to constitute a whole object; "a section of a fishing rod"; "metal sections were used below ground"; "finished the final segment of the road"
segment -
one of several parts or pieces that fit with others to constitute a whole object; "a section of a fishing rod"; "metal sections were used below ground"; "finished the final segment of the road"