four-dimensional

[fawr-di-men-shuh-nl, fohr-]

four-di·men·sion·al

[fawr-di-men-shuh-nl, fohr-]
adjective Mathematics.
of a space having points, or a set having elements, which require four coordinates for their unique determination.

Origin:
1875–80
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Four-dimensional is always a great word to know.
So is reduce. Does it mean:
a function having the dependent variable expressed directly in terms of the independent variables, such as y = 3x + 4
to change the denomination or form, but not the value, of a fraction or polynomial
Collins
World English Dictionary
four-dimensional
 
adj
having or specified by four dimensions, esp the three spatial dimensions and the dimension of time: a four-dimensional continuum

Collins English Dictionary - Complete & Unabridged 10th Edition
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