ring canal
Zoology
noun
A circular canal around the mouth, especially one forming part of the digestive system of some coelenterates or the water-vascular system of echinoderms.
Origin
Mid 19th century; earliest use found in Student & Intellectual Observer.
- letter bombing
- letter book
- letter-bound
- letter box
- letterbox
- letter card
- letter carrier
- letter case
- letter chute
- letter clip
- letter creditive
- letter cutter
- letter cutting
- letter drop
- letter dropper
- lettered
- letteree
- letterer
- Letterer–Siwe
- letter-for-letter
- letterform
- letter founder
- letter founding
- letter foundry
- lettergram