a. nonce-wd. Of or pertaining to costume; in costume.

1

1806.  J. Carter, in R. Davies, Walks through York (1880), 203. Three bustos … highly to be prized for their costumic references.

2

1855.  L. Hunt, Old Crt. Suburb, I. 195. Finally, to adopt the convenient word of … Mr. John Carter, there stands on each side of the first story, the ‘Costumic Statue of a charity-child.’

3