ge·ra·ni·a·ce·ae \jəˌrānēˈāsēˌē\noun plural Usage: capitalized Etymology: New Latin, from Geranium, type genus + -aceae : a family of mostly herbaceous plants (order Geraniales) having chiefly opposite or whorled leaves and flowers with one-seeded carpels that separate individually from a central column when ripe • ge·ra·ni·a·ceous\ ̷ ̷| ̷ ̷ ̷ ̷|āshəs\adjective