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Comprehensive
Dictionary Suite
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concurrence a point at which three or more lines or planes meet or cross; convergence. [1/4 definitions]
confluence a joining or convergence of two or more streams, or their point of junction. [1/3 definitions]
lens a piece of molded or ground transparent material such as glass, whose surfaces are curved so as to cause the divergence or convergence of light rays passing through it. [1/3 definitions]