"scalar" in the noun sense
1. scalar
a variable quantity that cannot be resolved into components
"scalar" in the adjective sense
1. scalar
of or relating to a musical scale
"he played some basic scalar patterns on his guitar"
2. scalar
of or relating to a directionless magnitude (such as mass or speed etc.) that is completely specified by its magnitude
"scalar quantity"
Source: WordNet® (An amazing lexical database of English)
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