segmental vs metameric

segmental and metameric both are adjectives.

Word	Noun	Adjective	Verb	Adverb
segmental	No	Yes	No	No
metameric	No	Yes	No	No

As adjectives, segmental and metameric are synonyms defined as:

segmental and metameric: having the body divided into successive metameres or segments, as in earthworms or lobsters

Other synonyms of segmental include segmented.

segmental (adjective)	metameric (adjective)
having the body divided into successive metameres or segments, as in earthworms or lobsters	having the body divided into successive metameres or segments, as in earthworms or lobsters
divided or organized into speech segments or isolable speech sounds