| RATUS | • ratus n. Plural of ratu. • RATU n. a local chief in Fiji, also RATOO. |
| STRATUS | • stratus n. (Meteorology) A principal, low-level cloud type in the form of a gray layer with a rather uniform base… • STRATUS n. (Latin) a low-lying cloud resembling a horizontal fog bank. |
| SERRATUS | • serratus n. (Anatomy) Any of several muscles of the vertebral or costal region that produce a serrated border. • SERRATUS n. (Latin) a muscle of the thorax. |
| APPARATUS | • apparatus n. The entirety of means whereby a specific production is made existent or task accomplished. • apparatus n. A complex machine or instrument. • apparatus n. (Collective) An assortment of tools and instruments. |
| LITERATUS | • literatus n. (Chiefly in the plural) A learned person; one acquainted with literature. • LITERATUS n. (Latin) a learned man; a man acquainted with literature. |
| QUADRATUS | • quadratus n. (Anatomy) Any of several roughly square or rectangular muscles, e.g. in the abdomen, thigh, and eye socket. • QUADRATUS n. the name of several quadrangular muscles. |
| SALERATUS | • saleratus n. Sodium bicarbonate. • saleratus n. Potassium bicarbonate. • SALERATUS n. potassium or sodium bicarbonate, used in raising agents such as baking powder. |
| FOEDERATUS | • foederatus n. A confederate. One of the tribes bound by treaty, who were neither Roman colonies nor had they been… • FOEDERATUS n. (Latin) a conquered enemy of Rome; an auxiliary soldier fighting for the Romans. |
| PERFORATUS | • perforatus n. (Anatomy) The short flexor of the toes, or the superficial flexor of the fingers. • PERFORATUS n. the short flexor of the toes or the superficial flexor of the finger. |
| ALTOSTRATUS | • altostratus n. (Physics, meteorology) A principal medium-level cloud type in the form of a gray or bluish (never white)… • ALTOSTRATUS n. (Latin) a type of cloud. |
| CIRROSTRATUS | • cirrostratus n. (Meteorology) A principal high-level cloud type appearing as a whitish veil, usually fibrous but sometimes… • CIRROSTRATUS n. (Latin) a type of cloud. |
| NIMBOSTRATUS | • nimbostratus n. (Meteorology) According to the World Meteorological Organization, a mid-level, principal cloud type… • NIMBOSTRATUS n. a type of cloud. |
| CUMULOSTRATUS | • cumulostratus n. Synonym of stratocumulus. • CUMULOSTRATUS n. a type of cloud. |
| FRACTOSTRATUS | • FRACTOSTRATUS n. a type of cloud. |