noun
- a member of the class Arachnida, which includes spiders, scorpions, ticks, and mites
Usage: scientific/technical term; often used in biology and zoology contexts
adjective
- of, relating to, or belonging to the class Arachnida
Usage: scientific/technical term
Examples
- Spiders are the most diverse arachnidan group.
- The arachnidan body is divided into two main segments.
- Scorpions are venomous arachnidans found in warm climates.
- Ticks are parasitic arachnidans that feed on blood.
- Scientists study arachnidan behavior to understand their ecological role.
- Most arachnidans have eight legs and multiple eyes.