1.
a small vent in a lava flow that allows the escape of built-up gases
2.
a small paired aperture along the side of the thorax or abdomen of an insect or spider through which air enters and leaves
3.
a small gill slit or opening behind the eye area of some fishes such as skates and rays
4.
a blowhole of a whale, dolphin, or similar ocean mammal
1.
a small vent in a lava flow that allows the escape of built-up gases
2.
a small paired aperture along the side of the thorax or abdomen of an insect or spider through which air enters and leaves
3.
a small gill slit or opening behind the eye area of some fishes such as skates and rays
4.
a blowhole of a whale, dolphin, or similar ocean mammal