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5 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典


From: DICT.TW English-Chinese Medical Dictionary 英漢醫學字典

 py·ram·i·dal /pəˈræmədḷ/ 形容詞

From: Webster's Revised Unabridged Dictionary (1913)

 Py·ram·i·dal a.
 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. 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 triangular pyramidal numbers; and 1, 5, 14, 30, 55, etc., are square pyramidal numbers.

From: Webster's Revised Unabridged Dictionary (1913)

 Py·ram·i·dal n. Anat. One of the carpal bones. See Cuneiform, n., 2 (b).

From: WordNet (r) 2.0

      adj : resembling a pyramid [syn: pyramidic, pyramidical]