cen·ter·piece (US) or Brit cen·tre·piece 
/ˈsɛntɚˌpi:s/ noun
plural cen·ter·piec·es /ˈsɛntɚˌpi:s/ noun 1 [count] : a decoration (such as a group of flowers) that is placed in the center of a table 2 [noncount] : the most important part of something — usually + of ▪ He made tax reform the centerpiece of his speech. ▪ Her voting record is the centerpiece of her campaign.
