[uh-rak-nid] 
| 1. | any wingless, carnivorous arthropod of the class Arachnida, including spiders, scorpions, mites, ticks, and daddy-longlegs, having a body divided into two parts, the cephalothorax and the abdomen, and having eight appendages and no antennae. Compare insect. |
| 2. | belonging or pertaining to the arachnids. |
[uh-rak-ni-duh
n] , adjective, noun | a·rach·nid (ə-rāk'nĭd) n. Any of various arthropods of the class Arachnida, such as spiders, scorpions, mites, and ticks, characterized by four pairs of segmented legs and a body that is divided into two regions, the cephalothorax and the abdomen. Also called arachnoid. [From New Latin Arachnida, class name, from Greek arakhnē, spider.] a·rach'ni·dan (-nĭ-dən) adj. & n. |
