PYRAMIDAL

pyramidal, pyramidic, pyramidical

(adjective) resembling a pyramid

Source: WordNet® 3.1

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Etymology

Adjective

pyramidal (not comparable)

(geometry) Pyramid-shaped.

(crystallography) Tetragonal.

Noun

pyramidal (plural pyramidals)

(anatomy) One of the carpal bones

Source: Wiktionary

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Py*ram`i*dal, a. Etym: [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. Mrs. Browning.

2. (Crystallog.)

Definition: Same as Tetragonal. Pyramidal numbers (Math.), 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 trangular pyramidal numbers; and 1, 5, 14, 30, 55, etc., are square pyramidal numbers.

Py*ram"i*dal, n. (Anat.)

Definition: One of the carpal bones. See Cuneiform, n., 2 (b).

Source: Webster’s Unabridged Dictionary 1913 Edition

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