Definition of basal
1a
: relating to, situated at, or forming the base
b
: arising from the base of a stem
basal leaves
2a
: of or relating to the foundation, base, or essence : fundamental
b
: of, relating to, or being essential for maintaining the fundamental vital activities of an organism : minimal
a basal diet
c
: used for teaching beginners
basal readers
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Time Traveler for basal
The first known use of basal was circa 1645
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