Glossary L

Glossary L

- Leta Stetter Hollingworth (1886-1939) : Leta Stetter Hollingworth rejected the belief, popular at the time, that women achieve less than males do because they are intellectually inferior to males; instead her explanation emphasized differences in social opportunity. Her career focused on improving the education of both subnormal and gifted students.

Lethal dose is defined as a dose of a drug at which a given percentage of individuals die within a specified time

Letter level is defined as the level of written perception in which a visual stimulus is represented as a letter of the alphabet.

Letter of recommendation refers to a letter expressing an opinion regarding an applicant’s ability, previous performance, work habits, character, or potential for success.

Letter-sound correspondences is the principle that each letter represents a unit of sound (a phoneme).

Leucocytes refers to white blood cells that find and destroy antigens

Leukemia is a cancer originating in blood or blood-producing cells. Leukemias are cancers that are found in the blood and bone marrow.

Leukocyte is white blood cell; a component of the immune system Leukocytes, moreover, are white blood cells (WBCs). The key cells to the immune system.