Definition of basal in US English:



  • Forming or belonging to a bottom layer or base.

    ‘basal epidermal cells’
    ‘the plant grows huge basal leaves’
    • ‘It was not clear whether the two central cells of the basal region of the stalk derived from the subepidermal layer or not.’
    • ‘Alcohol withdrawal symptoms and a left basal pneumonia complicated his recovery.’
    • ‘Thus, for four of the five treatments, the ratios of basal leaf to root were similar.’
    • ‘These cells originate in the lower epidermis by division of basal cells in the basal layer.’
    • ‘Cells are replaced from a basal layer of proliferating epidermal cells in contact with the basal lamina.’
    basic, foundational, rudimentary, elemental, elementary, underlying, radical, root
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