sonar

Definition

Artificial echolocation by use of electronic equipment, with hydrophones to locate objects underwater, using the same wave-analysis principles that radar uses.

Etymology

By anacronymic evolution from SONAR.

Example Sentences

• "They were able to detect the sunken wreck using sonar."
• "They finally bought a new sonar to replace the 40-year-old unit that sometimes didn't work right."
• "Submarines and bats both use sonar to navigate."