What is "brothers of the third order of st francis"

Franciscan \Fran*cis"can\, a. [LL. Franciscus Francis: cf. F. franciscain.] (R. C. Ch.) Belonging to the Order of St. Francis of the Franciscans.

Franciscan Brothers, pious laymen who devote themselves to useful works, such as manual labor schools, and other educational institutions; -- called also Brothers of the Third Order of St. Francis.

Franciscan Nuns, nuns who follow the rule of St. Francis, esp. those of the Second Order of St. Francis, -- called also Poor Clares or Minoresses.

Franciscan Tertiaries, the Third Order of St. Francis.