ˈlakˌtīd, -_tə̇d noun
( -s )
Etymology: International Scientific Vocabulary lact- + anhydr ide; probably originally formed in French
1. : a crystalline dilactone C 6 H 8 O 4 formed from two molecules of lactic acid by self-esterification
2. : a dilactone formed from an alpha-hydroxy acid other than lactic acid