Definition of Barrier. Meaning of Barrier. Synonyms of Barrier

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Definition of Barrier

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barrier reefs
Coral Cor"al, n. [Of. coral, F, corail, L. corallum, coralium, fr. Gr. kora`llion.] 1. (Zo["o]l.) The hard parts or skeleton of various Anthozoa, and of a few Hydrozoa. Similar structures are also formed by some Bryozoa. Note: The large stony corals forming coral reefs belong to various genera of Madreporaria, and to the hydroid genus, Millepora. The red coral, used in jewelry, is the stony axis of the stem of a gorgonian (Corallium rubrum) found chiefly in the Mediterranean. The fan corals, plume corals, and sea feathers are species of Gorgoniacea, in which the axis is horny. Organ-pipe coral is formed by the genus Tubipora, an Alcyonarian, and black coral is in part the axis of species of the genus Antipathes. See Anthozoa, Madrepora. 2. The ovaries of a cooked lobster; -- so called from their color. 3. A piece of coral, usually fitted with small bells and other appurtenances, used by children as a plaything. Brain coral, or Brain stone coral. See under Brain. Chain coral. See under Chain. Coral animal (Zo["o]l.), one of the polyps by which corals are formed. They are often very erroneously called coral insects. Coral fish. See in the Vocabulary. Coral reefs (Phys. Geog.), reefs, often of great extent, made up chiefly of fragments of corals, coral sands, and the solid limestone resulting from their consolidation. They are classed as fringing reefs, when they border the land; barrier reefs, when separated from the shore by a broad belt of water; atolls, when they constitute separate islands, usually inclosing a lagoon. See Atoll. Coral root (Bot.), a genus (Corallorhiza) of orchideous plants, of a yellowish or brownish red color, parasitic on roots of other plants, and having curious jointed or knotted roots not unlike some kinds of coral. See Illust. under Coralloid. Coral snake. (Zo) (a) A small, venomous, Brazilian snake (Elaps corallinus), coral-red, with black bands. (b) A small, harmless, South American snake (Tortrix scytale). Coral tree (Bot.), a tropical, leguminous plant, of several species, with showy, scarlet blossoms and coral-red seeds. The best known is Erythrina Corallodendron. Coral wood, a hard, red cabinet wood. --McElrath.

Meaning of Barrier from wikipedia

- up Barrier or barrier in Wiktionary, the free dictionary. A barrier or barricade is a physical structure which blocks or impedes something. Barrier may...
- The Great Barrier Reef is the world's largest coral reef system, composed of over 2,900 individual reefs and 900 islands stretching for over 2,300 kilometres...
- The Thames Barrier is a retractable barrier system built to protect the floodplain of most of Greater London from exceptionally high tides and storm surges...
- A barrier cream is a topical formulation used in industrial applications and as a cosmetic to place a physical barrier between the skin and contaminants...
- Barrier islands are a coastal landform, a type of dune system and sand island, where an area of sand has been formed by wave and tidal action parallel...
- The blood–brain barrier (BBB) is a highly selective semipermeable border of endothelial cells that regulates the transfer of solutes and chemicals between...
- diffusion barrier is a thin layer (usually micrometres thick) of metal usually placed between two other metals. It is done to act as a barrier to protect...
- A barrier option is an option whose payoff is conditional upon the underlying ****et's price breaching a barrier level during the option's lifetime. Barrier...
- In physics, quantum tunnelling, barrier penetration, or simply tunnelling is a quantum mechanical phenomenon in which an object such as an electron or...
- A Jersey barrier, Jersey wall, or Jersey bump is a modular concrete or plastic barrier emplo**** to separate lanes of traffic. It is designed to minimize...