arachnid
/əˈræknɪd/
noun
- A small animal of the class Arachnida, such as a spider, scorpion, tick, or mite, having eight legs and no antennae.
- Spiders are the most familiar type of arachnid.
- Unlike insects, an arachnid has eight legs instead of six.
- The scorpion is a venomous arachnid found in dry regions.