Keyhole urchin

Keyhole urchin
Keyhole Key"hole`, n. 1. A hole or apertupe in a door or lock, for receiving a key. [1913 Webster]

2. (a) (Carp.) A hole or excavation in beams intended to be joined together, to receive the key which fastens them. (b) (Mach.) a mortise for a key or cotter. [1913 Webster]

{Keyhole limpet} (Zo["o]l.), a marine gastropod of the genus Fissurella and allied genera. See {Fissurella}.

{Keyhole saw}, a narrow, slender saw, used in cutting keyholes, etc., as in doors; a kind of compass saw or fret saw.

{Keyhole urchin} (Zo["o]l.), any one of numerous clypeastroid sea urchins, of the genera {Melitta}, {Rotula}, and {Encope}; -- so called because they have one or more perforations resembling keyholes. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • keyhole urchin — noun : a flat sea urchin of the order Exocycloida with long narrow apertures occurring near the margin of the test …   Useful english dictionary

  • Keyhole — Key hole , n. 1. A hole or apertupe in a door or lock, for receiving a key. [1913 Webster] 2. (a) (Carp.) A hole or excavation in beams intended to be joined together, to receive the key which fastens them. (b) (Mach.) a mortise for a key or… …   The Collaborative International Dictionary of English

  • Keyhole limpet — Keyhole Key hole , n. 1. A hole or apertupe in a door or lock, for receiving a key. [1913 Webster] 2. (a) (Carp.) A hole or excavation in beams intended to be joined together, to receive the key which fastens them. (b) (Mach.) a mortise for a key …   The Collaborative International Dictionary of English

  • Keyhole saw — Keyhole Key hole , n. 1. A hole or apertupe in a door or lock, for receiving a key. [1913 Webster] 2. (a) (Carp.) A hole or excavation in beams intended to be joined together, to receive the key which fastens them. (b) (Mach.) a mortise for a key …   The Collaborative International Dictionary of English

  • cake urchin — noun Etymology: so called from the disklike shape : a strongly flattened sea urchin (order Exocycloida): as a. : sand dollar b. : keyhole urchin …   Useful english dictionary

  • disk-urchin — ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun : a flattened sea urchin (as a sand dollar or a keyhole urchin) …   Useful english dictionary

  • cake urchin — ▪ species of echinoderm       any of the echinoid marine invertebrates of the order Clypeastroida (phylum Echinodermata), in which the body is flattened. The surface is covered with short spines (often furlike) and inconspicuous pedicellariae… …   Universalium

  • List of acquisitions by Google — Google s logo Google is a computer software and a web search engine company. Each acquisition listed is for the respective company in its entirety, unless otherwise specified. The acquisition date listed is the date of the agreement between… …   Wikipedia

  • Google-Dienstleistungen — 37.422222222222 122.084444444447Koordinaten: 37° 25′ 20″ N, 122° 5′ 4″ W …   Deutsch Wikipedia

  • Google.org — 37.422222222222 122.084444444447Koordinaten: 37° 25′ 20″ N, 122° 5′ 4″ W …   Deutsch Wikipedia

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