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Not to be confused with basil or basel.

Basal or basilar is a term meaning base, bottom, or minimum.


  • Basal (anatomy), an anatomical term of location for features associated with the base of an organism or structure
  • Basal (medicine), a minimal level that is necessary for health or life, such as a minimum insulin dose
  • Basal (phylogenetics), the "base" or earliest clade to branch in a larger clade



  • Basal sliding, the act of a glacier sliding over the bed before it due to meltwater increasing the water pressure underneath the glacier causing it to be lifted from its bed.