Glossary Terms: L

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

Labyrinth
Organ of balance located in the inner ear. The labyrinth consists of three semicircular canals and the vestibule.

Labyrinthine Hydrops
Excessive fluid in the organ of balance (labyrinth); can cause pressure or fullness in the ears, hearing loss, dizziness, and loss of balance.

Labyrinthitis
Viral or bacterial infection or inflammation of the inner ear that can cause dizziness, loss of balance, and temporary hearing loss.

Landau-Kleffner Syndrome
Childhood disorder of unknown origin which often extends into adulthood and can be identified by gradual or sudden loss of the ability to understand and use spoken language.

Language
System for communicating ideas and feelings using sounds, gestures, signs, or marks.

Language Disorders
Any of a number of problems with verbal communication and the ability to use or understand a symbol system for communication.

Laryngeal Neoplasms
Abnormal growths in the larynx (voice box) that can be cancerous or noncancerous.

Laryngeal Nodules
Noncancerous, callous-like growths on the inner parts of the vocal folds (vocal cords); usually caused by vocal abuse or misuse.

Laryngeal Paralysis
Loss of function or feeling of one or both of the vocal folds caused by injury or disease to the nerves of the larynx.

Laryngectomy
Surgery to remove part or all of the larynx (voice box).

Laryngitis
Hoarse voice or the complete loss of the voice because of irritation to the vocal folds (vocal cords).

Larynx
Valve structure between the trachea (windpipe) and the pharynx (the upper throat) that is the primary organ of voice production.

Learning Disabilities
Childhood disorders characterized by difficulty with certain skills such as reading or writing in individuals with normal intelligence.

Least Restrictive Environment (LRE)
To the maximum extent appropriate, children with disabilities are to be educated with children who are not disabled. Special classes, separate schooling or other ways of removing children with disabilities from the regular educational environment should only occur when the nature or severity of the disability is such that education in regular classes cannot be achieved satisfactorily with the use of supplementary aids and services.

Listening and Spoken Language Specialists
Listening and Spoken Language Specialists (LSLSs) help children who are deaf or hard of hearing develop spoken language and literacy primarily through listening. LSLSs focus on education, guidance, advocacy, family support and the rigorous application of techniques, strategies and procedures that promote optimal acquisition of spoken language through listening by newborns, infants, toddlers and children who are deaf or hard of hearing.

LSLSs guide parents in helping their children develop intelligible spoken language through listening and coach them in advocating their children’s inclusion in a mainstream school. Ultimately, parents gain confidence that their children will have access to the full range of educational, social and vocational choices in life.

Lipreading
Visually obtaining speech information from the movements of a speaker’s mouth in order to determine what is being said.  See also Speechreading.

Local Education Agency (LEA)
Term used to describe a local school district. Often referred to as “the district.”