Century Dictionary and Cyclopedia
- Pertaining to a pyramid, or having its form. Also pyramidical.
- In bot., anat., and zoology, shaped more or less like a pyramid; conical; pyriform.
- In anatomy, noting a muscle whose fibers arise from a long base and converge to the point of their insertion: correlative with prismatic, 3, and rhomboidal, 2.
GNU Webster's 1913
- adj. Of or pertaining to a pyramid; in the form of a pyramid; pyramidical.
- adj. (Crystallog.) Same as Tetragonal.
- n. (Anat.) One of the carpal bones. See cuneiform, n., 2 (b).
- adj. resembling a pyramid
- From medieval Latin pyramidalis (Wiktionary)
“We loved the presentation on the rice in pyramidal form.”
“It is often called the pyramidal or fastigiate poplar.”
“The fibers from the motor area form into a bundle called the pyramidal tract, or pyramidal system.”
“These are called pyramidal cells (from their shape), or Betz cells (after the Russian anatomist Vladimir Betz, who first described them in 1874).”
“A third lobe, of conical shape, called the pyramidal lobe, frequently arises from the upper part of the isthmus, or from the adjacent portion of either lobe, but most commonly the left, and ascends as far as the hyoid bone.”
“When these pyramidal fibers are traced downward it is found that some two-thirds or more of them leave the pyramids in successive bundles, and decussate in the anterior median fissure, forming what is termed the pyramidal decussation.”
“They are ordinarily called pyramidal or fastigiate forms, and as far as their history goes, they arise suddenly in large sowings of the normal species.”
“The same want was met in Yucatan and Chiapas by a new expedient namely a pyramidal platform or elevation of earth twenty, thirty and forty feet high upon the level summits of which their great houses were erected.”
“Scottish ell -- as in recent times the divine origin of the so-called pyramidal cubit and inch -- was pleaded rather strenuously.”
“Most of the neurons within a column, and therefore within the cortex as a whole, are so-called pyramidal neurons, whose output excites the cell it synapses with.”
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