leaf

Earless ghost swift moths become “invisible” to echolocating bats by forming mating clusters close (less than half a meter) above vegetation and effectively blending into the clutter of echoes that the bat receives from the leaves and stems around them.

gold leaf

Heretofore advertisers have had to buy and pay for a leaf — two pages.

The train car has one single-leaf and two double-leaf doors per side.

The algorithm pops the stack to obtain a new current node when there are no more children (when it reaches a leaf).