that is to say

In other words.

See also: say

Name	Pronounced	Usage
Rosa	['rəuzə]
Tobit	-	Biblical, Biblical Latin
Eukene	-	Basque
Arsenios	-	Ancient Greek
Healy	['hi:li]
Emmeline	EM-ə-leen, EM-ə-lien	English (Archaic)