from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Of, relating to, located at, or forming a base.
  • adjective Botany Located at or near the base of a plant stem, or at the base of any other plant part.
  • adjective Of primary importance; basic.

from The Century Dictionary.

  • In a typical solitary coral, as Caryophyllia, that part of the skeleton which is between the zoöid and the surface of attachment.
  • noun Same as genital plate (which see, under genital).
  • Of or pertaining to the base; constituting the base; fundamental.
  • Pertaining to the base of a part or organ. On or near the base: as, a basal mark.
  • Nearest the base: as, the basal joint, or the four basal joints of an insect's antenna.
  • In ichthyology, of or pertaining to the basalia. See basale.
  • In the wings of Diptera, one of the elongate cells near the base of the wing between the second and fifth or second and sixth longitudinal veins; they are numbered, the first being the one nearest the costal margin.
  • noun One of the basal joints of the branches of a crinoid, bearing the radials.
  • noun In ichthyology, the basisphenoid.

from the GNU version of the Collaborative International Dictionary of English.

  • adjective Relating to, or forming, the base.
  • adjective See under Cleavage.
  • adjective (Crystallog.) a plane parallel to the lateral or horizontal axis.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Relating to, or forming, the base, or point of origin.
  • adjective In a phylogenetic tree, being a group, or member of a group, which diverged earlier.
  • noun anatomy Any basal structure or part

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective especially of leaves; located at the base of a plant or stem; especially arising directly from the root or rootstock or a root-like stem
  • adjective serving as or forming a base
  • adjective of primary importance


from Wiktionary, Creative Commons Attribution/Share-Alike License

base +‎ -al


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  • Furthermore, while the cochleal canal is shorter, and the promontorium is smaller, in basal mammaliaforms than is the case in mammals (Luo et al. 1995), Morganucodon in more mammal-like in these features than are more basal mammaliaforms (like Sinoconodon).

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  • This is what is referred to as your basal metabolic rate BMR.

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  • This is what is referred to as your basal metabolic rate BMR.

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  • This is what is referred to as your basal metabolic rate BMR.

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  • This is what is referred to as your basal metabolic rate BMR.

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  • The disease-induced destruction of these cells, which are called "basal forebrain cholinergic" BFC neurons, is key to the progression of Alzheimer's.

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