spider

noun

1. Any species in the order Araneae having a body divided into a cephalothorax bearing eight legs, two poison fangs, and two feelers and an unsegmented abdomen bearing several spinnerets that produce the silk used to make nests, cocoons, or webs for trapping insects. 2. a wet or dry fly with long hackles, falling lightly to the water surface (and so good for novice casters) and riding high and resembling many insects. Most effective on glassy water. 3. software that crawls the web, finds web pages, and feeds them to search engines. A webcrawler.