1. a member of the class of arthropods that includes spiders, scorpions, mites, and ticks, characterized by having eight legs and no antennae
Usage: scientific

Examples

• The spider is a common arachnid found in most homes.
• Scorpions are arachnids that live in desert regions.
• Unlike insects, arachnids have eight legs instead of six.
• Ticks are tiny arachnids that can carry diseases.
• The biology class studied various arachnids under the microscope.
• Many people fear arachnids, especially spiders.
• Arachnids belong to the same phylum as insects and crustaceans.