an optical system consisting of two or more lenses having the same axis.
4 Ways To Structure Your SentencesThe four types of sentence structures are simple, compound, complex, and compound-complex. The quantity and arrangement of clauses determines the makeup of each type of sentence structure. A clause is a grouping of words with both a subject and a verb that can (but doesn’t always) form a sentence. If the clause can form a complete thought on its own, it’s considered an independent clause. …
Retro Words You’ll Probably Never Use AgainMost of these retronyms -- obsolete words and phrases -- are outdated technologies.
- compound hyperopic astigmatism,
- compound interest,
- compound interval,
- compound joint,
- compound leaf,
- compound magnet,
- compound microscope,
- compound myopic astigmatism,
- compound number,
- compound odontoma
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a lens consisting of more than one component lens
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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