Op″er‐ose′ (?). a. [L. operosus, fr. opera pains, labor, opus, operis, work, labor.] Wrought with labor; requiring labor; hence, tedious; wearisome. “Operose proceeding.” Burke. “A very operose calculation.” De Quincey. — Op″er‐ose′ly, adv. — Op″er‐ose′ness, n.
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Webster's Dictionary 1913
Webster's Revised Unabridged Dictionary, C. & G. Merriam Co., 1913.