strato-cumulus

stree-to’kcumju-tos n. a stratum or layer of low cloud consisting of separate arregular ma es: net sufficiently unrferm to be pure stratus; cumuloczstzatus. strato-nimbus;stree-to’nimb as m. stratus cloud causing rain; stratus rain-cloud. stratum ‘stree-tam n. [ploral strata] a layer of any material, as air or cloud; an airzlayer. reactive stratum, a styatum or layer of air which is comp rest by and reacts against an aerofeil, as the atmosferzc stratum beneath a flying aeroplane or behind a revolving propeller.