Basal definition

bāsəl, -zəl
Of, relating to, located at, or forming a base.
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Of, at, or forming the base.
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Being the base or basis; basic; fundamental.
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Of primary importance; basic.
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(botany) Located at or near the base of a plant stem, or at the base of any other plant part.

Basal placentation.

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(bot.) Growing from the base of a stem.
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Relating to, or forming, the base, or point of origin.
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(chiefly systematics) In a phylogenetic tree, being a group, or member of a group, which diverged earlier.

Hittite is a basal Indo-European language.

A magnolia is a basal angiosperm.

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(anatomy) Any basal structure or part.
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Other Word Forms

Noun

Singular:
basal
Plural:
basals

Origin of basal

  • base +‎ -al

    From Wiktionary