La*bo"ri*ous (?), a. [L.
laboriosus,fr. labor labor: cf. F. laborieux.]
1. Requiring labor, perseverance, or sacrifices;
toilsome; tiresome.
Dost thou love watchings, abstinence, or toil,
Laborious virtues all ? Learn these from Cato.
Addison.
2. Devoted to labor; diligent; industrious;
as, a laborious mechanic.
-- La*bo"ri*ous*ly, adv. --
La*bo"ri*ous*ness, n.