complemental
1. [ adjective ] acting as or providing a complement (something that completes the whole)
Synonyms: complementary completing
Related terms: inessential
Similar spelling:   complement
  complementary
  complementarity
  complementation
  compliment
  complimentary
  complacent
  completely
  compliments
  complacently
  compliant
  complaint
  completed
  completion
  complexion
  complexity
  complexly
  completing
  complection
  completeness
  complaisant
  complaintive
  complainant