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spider

A Dictionary of Astronomy | 1997 | Â© A Dictionary of Astronomy 1997, originally published by Oxford University Press 1997. (Hide copyright information) Copyright

spider The support of the central secondary mirror in reflecting telescopes such as Newtonians and Cassegrains. A spider generally has three or four arms which attach the secondary to the tube.

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"spider." A Dictionary of Astronomy. 1997. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

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spider

The Concise Oxford Dictionary of English Etymology | 1996 | | Â© The Concise Oxford Dictionary of English Etymology 1996, originally published by Oxford University Press 1996. (Hide copyright information) Copyright

spider OE. spīðra :- *spinþran-, f. spinnan SPIN.

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T. F. HOAD. "spider." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

T. F. HOAD. "spider." The Concise Oxford Dictionary of English Etymology. 1996. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O27-spider.html

T. F. HOAD. "spider." The Concise Oxford Dictionary of English Etymology. 1996. Retrieved December 21, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O27-spider.html

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spider

A Dictionary of Computing | 2004 | | Â© A Dictionary of Computing 2004, originally published by Oxford University Press 2004. (Hide copyright information) Copyright

spider (crawler, Web crawler) An automatic program that searches the Internet, finding new Web sites and producing an index of addresses and content for use in a search engine.

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JOHN DAINTITH. "spider." A Dictionary of Computing. 2004. Encyclopedia.com. 21 Dec. 2009 <http://www.encyclopedia.com>.

JOHN DAINTITH. "spider." A Dictionary of Computing. 2004. Encyclopedia.com. (December 21, 2009). http://www.encyclopedia.com/doc/1O11-spider.html

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