sinkhole
Kelime Anlamı :
1. ponor.
2. çökme cukuru.
3. subatan.
4. kaya veya kayalık arazide bulunan ve içindeki suyun sızmasıyle kuruyan çukur.
Tanımlar :
1.
A natural depression in a land surface communicating with a subterranean passage, generally occurring in limestone regions and formed by solution or by collapse of a cavern roof.
from The American Heritage® Dictionary of the English Language, 4th Edition
1.
A hole formed in soluble rock by the action of water, serving to conduct surface water to an underground passage
2. A depressed area in which waste or drainage collects.
3. A hole in the playfield that rewards the player when the ball is guided into it.
2. A depressed area in which waste or drainage collects.
3. A hole in the playfield that rewards the player when the ball is guided into it.
from Wiktionary, Creative Commons Attribution/Share-Alike License