From AMS Glossary
- Rapidly changing, predominantly vertical spike-like structures in the solar chromosphere and observed extending from the solar limb. Spicules appear to be ejected from the low chromosphere at velocities of 20–30 km s−1 and can reach heights of 9000 km before falling back or fading. Their total lifetime generally spans 5–10 minutes.
Term edited 10 September 2018.