One who calls upon (a person, especially a god) for help, assistance or guidance. / One who appeals for validation to a (notably cited) authority. / One who conjures up spirits with incantations.

Wearing a cap. / (poetic) Covered as if with a cap.

A lake in Newfoundland and Labrador, Canada.

The phase of the moon when it is in opposition to the sun and its full disc is therefore visible. / The moon when it is in opposition to the sun.