Definition of "Græcians"

[…]I thinke it not amiſſe , by way of diſcourſe , to give you a ſhort account of the five Moods uſed by the ancient Græcians in their ſeverall varieties of their Muſick[…]

1655, John Playford, chapter VII, in An Introduction to the Skill of Musick‎, archived from the original on 3 January 2011, page 31