Online Google Dictionary

complemental 中文解釋 wordnet sense Collocation Usage Collins Definition
  1. acting as or providing a complement (something that completes the whole)
  2. Of the nature of a complement; completing; Complementary; Additional; supplemental, accessory; ancillary; Of the nature of a ceremony that is not essential but accessory; ceremonial; ceremonious; formal; Of persons: accomplished; talented; experienced; Complimentary