GNU Collaborative International Dictionary of English

Found one definition

1.       
   Picul (?), n. [Jav. & Malay pikul, fr. pikul to carry on the back, to carry a burden; n., a man's burden.] A commercial weight varying in different countries and for different commodities. In Borneo it is 135⅝ lbs.; in China and Sumatra, 133½ lbs.; in Japan, 133⅓ lbs.; but sometimes 130 lbs., etc. Called also, by the Chinese, tan. [Written also pecul, and pecal.]
   
   [1913 Webster]