(organic chemistry) Any benzoate ester of tartaric acid (formed from one or both of the hydroxyl groups of tartaric acid)

The first day of May (since 1752); May Day, a Scottish quarter day, sometimes associated by Christians with the nearest Church Feast, the Invention of the Cross (May 3rd), and Whitsunday (May 15th).

A chek, the Hong Kong variant of the Chinese foot now standardized as 0.371475 meters.

Pertaining to an enigma; enigmatic; mysterious.