[chawl-druh
n] 
| an English dry measure formerly used for coal, coke, lime, and the like, varying locally from 32 to 36 bushels or more. |
| chal·dron (chôl'drən) n. A unit of dry measure formerly used in England, equal to 4 quarters or about 32 bushels for grain and 36 bushels for coal. [Middle English, from Old French chauderon, augmentative of chaudiere, kettle, from Late Latin caldāria; see cauldron.] |