1. A coral island, consisting of a strip or ring of coral surrounding a central lagoon.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• rtell,
• adolt,
• toall,
• itold,
• tatol,
• atol,
• apolo,
• atuly,
• astill,
• atilla,
• amll,
• aoll,
• afool,
• matell,
• ahll,
• atour,
• atila,
• apoll,
• utill,
• atill

• atole,
• at all,
• Atwell,
• attila,
• attalea,
• atwill,
• attlee.

The adjective form of the word "atoll" is "atolline".

The plural of the "atoll" can be the "atolls".

The singular of the "atoll" can be the "atoll".