Out of the ordinary; exceeding the usual, average, or normal measure or degree. Extraordinary average. A contribution by all the parties concerned in a mercantile voyage, either as to the vessel or cargo, toward a loss sustained by some of the parties in interest for the benefit of all. Wilson v. Cross, 33 Cal. 69. Extraordinary care is synonymous with greatest care, utmost care, highest degree of care. Railroad Co. v. Baddeley, 54 111. 24, 5 Am. Rep. 71; Railway Co. v. Causler, 9r Ala. 235, 12 South. 439. See CASE; DILIGENCE; NEGLIGENCE. Extraordinary remedies. The writs of mandamus, quo warranto, habeas corpus, and some others are sometimes called “extraordinary remedies,” in contradistinction to the ordinary remedy by action.