water-retaining structure
21Caisson (engineering) — In geotechnical engineering, a caisson is a retaining, watertight structure used, for example, to work on the foundations of a bridge pier, for the construction of a concrete dam, or for the repair of ships. These are constructed such that the… …
22Insect wing — Original veins and wing posture of a dragonfly. Hoverflies hovering to mate …
23Polder — A polder is a low lying tract of land enclosed by embankments known as dikes, that forms an artificial hydrological entity, meaning it has no connection with outside water other than through man operated devices. There are three types of polders …
24bulkhead — bulkheaded, adj. /bulk hed /, n. 1. Naut. any of various wall like constructions inside a vessel, as for forming watertight compartments, subdividing space, or strengthening the structure. 2. Aeron. a transverse partition or reinforcing frame in… …
25bulkhead — bulk•head [[t]ˈbʌlkˌhɛd[/t]] n. 1) naut. navig. a wall like construction inside a ship or airplane, as for forming watertight compartments or strengthening the structure 2) civ a partition built in a subterranean passage to prevent the passage of …
26Geckel — is a super sticky adhesive that can attach to both wet and dry surfaces. The adhesive s strength comes from coating fibrous silicone, similar in structure to a gecko s foot, with a polymer that mimics the glue used by mussels. [… …
27Terricola — Taxobox name = Terricolans |thumb image caption = Geoplana burmeisteri Schultze Mueller, 1857, a typical Geoplanidae from the atlantic rainforests of southern Brazil regnum = Animalia phylum = Platyhelminthes classis = Turbellaria subclassis =… …
28Geotechnical engineering — [ Boston s Big Dig presented geotechnical challenges in an urban environment.] Geotechnical engineering is the branch of civil engineering concerned with the engineering behavior of earth materials. Geotechnical engineering includes investigating …
29harbours and sea works — Introduction harbour also spelled harbor any part of a body of water and the manmade structures surrounding it that sufficiently shelters a vessel from wind, waves, and currents, enabling safe anchorage or the discharge and loading of… …
30United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
