pyramidal
AdjectiveUS[per-am-uh-duhl]/pɚˈæmədəl/4 syllables
Open English WordNet
Adjective (1)
- resembling a pyramidSynonyms: pyramidicpyramidicalOpposite pointlessSimilar pointed
Word of the day · Oct 27About this word
omniscientadjective
What does it mean? Question 1 of today’s quiz
Webster's Dictionary (1913)
Py·ram′i·dal adjective
Origin: Cf. F. pyramidal.
1. Of or pertaining to a pyramid; in the form of a a pyramid; pyramidical; as, pyramidal cleavage.
The mystic obelisks stand up Triangular, pyramidal.— Eliz. Barrett Browning
2. Crystallography Same as Tetragonal.
Pyramidal numbers Mathematics, certain series of figurate numbers expressing the number of balls or points that may be arranged in the form of pyramids. Thus 1, 4, 10, 20, 35, etc., are triangular pyramidal numbers; and 1, 5, 14, 30, 55, etc., are square pyramidal numbers.
Py·ram′i·dal noun
Anatomy One of the carpal bones. See Cuneiform, noun, 2 (b).
Webster’s Revised Unabridged Dictionary (1913), from GCIDE 0.54