• Device for holding a secondary mirror in place in a reflecting telescope, so called for its shape which involves several arms with a round body at the centre
  • A program which searches Web sites and organizes the located information. Also called crawler, Web crawler, or bot (2).
  • In a speaker, a component which holds the voice coil and/or the rear of the diaphragm near the magnet, without letting them touch. A spider is also connected to the basket, for support, and helps, for instance, to return the speaker to its rest position when no signal is present.
  • A device, object, arrangement, mechanism, or movement which is similar in any manner to spiders. For example, a hub with radial spokes.

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