Acan

Acan is the  Mayan god of wine. He is identified with the local brew, balche, made from fermented honey to which the bark of the balche tree has been added.
See more at Wikipedia.org...

The Advisory Committee on Antarctic Names (ACAN or US-ACAN) is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica. The United States does not recognise territorial boundaries within Antarctica, so ACAN will assign names to features anywhere within the continent, in consultation with other national nomenclatural bodies where appropriate.
See more at Wikipedia.org...

[Mayan] The god of wine in Mayan mythology. 

that opens extensor, tensor

(Sd) miniscule in amount