Definition of "solid geometry" []

• The branch of mathematics that deals with three-dimensional figures and surfaces. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "NEARLY equal with the number of days and nights in the year (730), compared with the ‘slight correction’ of the sacred number 5040, which is divisible by all the numbers from 1 to 12 except 11, and divisible by 11, if two families be deducted; or once more, we may compare the ignorance of solid geometry of which he complains in the Republic and the puzzle about fractions with the difficulty in the Laws about commensurable and incommensurable quantities — and the malicious emphasis on the word gunaikeios"