The Collaborative International Dictionary of English v.0.48:
Toga \To"ga\, n.; pl. E. Togas, L. Togae. [L., akin to
tegere to cover. See Thatch.] (Rom. Antiq.)
The loose outer garment worn by the ancient Romans,
consisting of a single broad piece of woolen cloth of a shape
approaching a semicircle. It was of undyed wool, except the
border of the toga praetexta.
Toga praetexta. [L.], a toga with a broad purple border,
worn by children of both sexes, by magistrates, and by
persons engaged in sacred rites.
Toga virilis [L.], the manly gown; the common toga. This
was assumed by Roman boys about the time of completing
their fourteenth year.