Triangular crab
Triangular Tri*an"gu*lar, a. [L. triangularis: cf. F. triangulaire.] 1. Having three angles; having the form of a triangle. [1913 Webster]

2. (Bot.) Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem. [1913 Webster]

{Triangular compasses}, compasses with three legs for taking off the angular points of a triangle, or any three points at the same time.

{Triangular crab} (Zo["o]l.), any maioid crab; -- so called because the carapace is usually triangular.

{Triangular numbers} (Math.), the series of numbers formed by the successive sums of the terms of an arithmetical progression, of which the first term and the common difference are 1. See {Figurate numbers}, under {Figurate}. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

Look at other dictionaries:

  • triangular crab — noun Etymology: so called from the shape of the carapace : oxyrhynch 1 …   Useful english dictionary

  • Triangular — Tri*an gu*lar, a. [L. triangularis: cf. F. triangulaire.] 1. Having three angles; having the form of a triangle. [1913 Webster] 2. (Bot.) Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem. [1913 Webster]… …   The Collaborative International Dictionary of English

  • Triangular compasses — Triangular Tri*an gu*lar, a. [L. triangularis: cf. F. triangulaire.] 1. Having three angles; having the form of a triangle. [1913 Webster] 2. (Bot.) Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem. [1913 …   The Collaborative International Dictionary of English

  • Triangular numbers — Triangular Tri*an gu*lar, a. [L. triangularis: cf. F. triangulaire.] 1. Having three angles; having the form of a triangle. [1913 Webster] 2. (Bot.) Oblong or elongated, and having three lateral angles; as, a triangular seed, leaf, or stem. [1913 …   The Collaborative International Dictionary of English

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  • spider crab — any of various crabs of the family Majidae, having long, slender legs and a comparatively small, triangular body. [1700 10] * * * Any species of sluggish marine crab in the widely distributed family Majidae (or Maiidae). Spider crabs have a beak… …   Universalium

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