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Definition of spider
an eight-legged predatory arachnid with an unsegmented body consisting of a fused head and thorax and a rounded abdomen. Spiders have fangs that inject poison into their prey, and most kinds spin webs in which to capture insects.
- Order Araneae, class Arachnida
used in names of arachnids similar or related to the spider, e.g., sea spider, sun spider. any object resembling a spider, especially one having numerous or prominent legs or radiating spokes. a cast-iron iron frying pan, originally made with legs for cooking on coals in a hearth. a long-legged rest for a billiard cue that can be placed over a ball without touching it.
verb [no object]
move in a scuttling manner suggestive of a spider:a treecreeper spidered head first down the tree trunk form a pattern suggestive of a spider or its web.