"linear" in the adjective sense
1. linear, additive
designating or involving an equation whose terms are of the first degree
2. linear, one-dimensional
of or in or along or relating to a line involving or having a single dimension
"a linear measurement"
3. analogue, analog, linear
of a circuit or device having an output that is proportional to the input
4. linear, elongate
of a leaf shape) long and narrow
5. linear, running
"cost of lumber per running foot"
Source: WordNet® (An amazing lexical database of English)
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