any seaweed of the genus Ulva, having large leaflike blades.
any of various green seaweeds of the genus Ulva, which have edible wavy translucent fronds
noun 1. the horizontal plane or level corresponding to the surface of the sea at mean level between high and low tide. noun 1. the level of the surface of the sea with respect to the land, taken to be the mean level between high and low tide, and used as a standard base for […]
- Sea-level pressure
[see-lev-uh l] /ˈsiˌlɛv əl/ noun 1. the atmospheric pressure, at any elevation, reduced by formula to a value approximating the pressure at sea level.
noun 1. a system for transporting persons or cargo by ship, especially in an emergency. 2. the act of transporting such persons or cargo. verb (used with object) 3. to transport (persons or cargo) by sealift.
noun 1. a stalked, sessile crinoid. noun 1. any of various sessile echinoderms, esp of the genus Ptilocrinus, in which the body consists of a long stalk attached to a hard surface and bearing a central disc with delicate radiating arms: class Crinoidea (crinoids)