glossary of common forestry terminology . Click letter to advance to that section of the glossary: A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z . ACRE â Area of land containing 43,560 square feet. A square 1-acre plot measures 209 feet by 209 feet; a circular acre has a radius of 117.75 feet.
Lung cancer is a type of cancer that begins in the lungs. Your lungs are two spongy organs in your chest that take in oxygen when you inhale and release carbon dioxide when you exhale. Lung cancer is the leading cause of cancer deaths in the United States, among both men and women.
lung. 1  either of the two saclike respiratory organs in the thorax of humans and the higher vertebrates. 2  an analogous organ in certain invertebrates, as arachnids or terrestrial gastropods. 3  at the top of one's lungs, as loudly as possible; with full voice: The baby cried at the top of his lungs.