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5 definitions found

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

 pyramidal
 (a.)金字塔形的,角錐狀的,錐體的錐骨

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

 py·ram·i·dal /pəˈræmədḷ/ 形容詞
 (拉pyramidalis)金字塔形的,錐形的,錐體的

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).
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From: WordNet (r) 2.0

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