(a kyə rət): (1) Free from error especially as the result of care; (2) conforming exactly to truth or to a standard.

(al gə ri thəm): A procedure for solving a mathematical problem (like finding the greatest common divisor) in a finite number of steps that frequently involves repetition of an operation.

(ǝ kwä tik): Growing or living in or often found in water.

(är kē ä lə jē): The scientific study of material remains (such as tools, pottery, jewelry, stone walls, and monuments) of past human life and activities.

(bī ō mas): The amount of living matter (in a unit area or volume of habitat).

(klī mǝt): The average weather conditions of a particular place or region over a period of years.

(kȯr): (verb) To remove a core from (like taking a sample from a tree’s core with a drill).

(dā tə bās): A usually large collection of data organized especially for rapid search and retrieval (as by a computer).

(de fi cāt): To expel feces from the bowels.

(den drō krə nä lə jist): A scientist who studies dating events and variations in the environment in former periods by comparing growth rings in trees and aged wood.

(e lǝ vā shǝn): The height above sea level.

(ē mit): To throw or give off or out; to send out.

(flüm): A sloping channel for carrying water.

(jər mə nāt): To cause to sprout or develop.

(grā dē ənt): (1) Slope; upward or downward slant or inclination or degree of slant; (2) a continuous graded change in measure, activity, or substance.

(in vər tə brət or in vər tə brāt): An animal (such as a worm, clam, spider, or butterfly) that lacks a backbone.

(mär sü pē əl): Any of an order of mammals (such as kangaroos and opossums) that have a pouch on the abdomen of the female containing the teats and serving to carry the young.

(ä sə lā shən): Variation or fluctuation.

(pri zərv): To keep alive, intact, or free from decay.

(tǝ päg rǝ fē): The shape and height and depth of the features of a place.