waterhole
How to Use Waterhole
Learner’s notesIn plain EnglishA spot where water collects for animals to drink, or casually, a bar.
Word Forms
waterholes plural
Fill the Gap
Can you complete this real example?
The elephants gathered at the _____ every evening.
Etymology
A plain compound of "water" and "hole." In radio astronomy the term was borrowed by scientist Bernard Oliver in 1971 for a quiet band of the radio spectrum between hydrogen and hydroxyl emission lines, on the idea that alien civilizations might use this "quiet" frequency range to communicate — much like animals gathering at a literal waterhole.