Glossary J

Jaw (hunting)
A part of a steel trap that comes together because of the action of the springs.

Jetties
Granite boulders used to protect coastal inlets and passes from sand erosion.

Jovian Planet
Any of the four outer, gaseous planets: Jupiter, Saturn, Uranus, and Neptune.

Jump the string (hunting)
When an animal hears the "twang" of an archer releasing an arrow and reacts, sometimes moving out of the path of the arrow before it arrives.