myrtleberry

Myrtleberry is likely misspelled.

Myrtleberry has no English definition.

As a noun blueberry

is an edible round berry, belonging to the cowberry group (section: Vaccinium sect. Cyanococcus), with flared crowns at the end, that turns blue on ripening.

As an adjective blueberry

is of a dark blue colour.

As a verb blueberry

is to gather or forage for blueberries.