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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
Habilitation
An educational approach used with exceptional children which is directed toward
the development of the necessary skills required for successful adulthood.
Hallucination
A imaginary visual image that is regarded as a real sensory experience by the
person.
Handicap
A physical and/or mental disability which causes difficulty in performing
specific tasks, such as: walking, seeing, hearing, speaking, learning, or
working.
Handicapism
Prejudice or discrimination based solely on a person’s disability, without
regard for individual characteristics.
Haptic Sense
Combined kinesthetic and tactile sense.
Hard of Hearing
Level of hearing loss that makes it difficult, although not impossible, to
comprehend speech through the sense of hearing alone.
Hearing Impaired
Describes anyone who has a hearing loss significant enough to require special
education, training, and/or adaptations; includes both deaf and hard-of-hearing
conditions; generally referred to as an auditory impairment.
Hemiplegia
Paralysis of both the arm and the leg on the same side of the body.
Hemophilia
An inherited deficiency in blood-clotting ability, which can cause serious
internal bleeding.
Hertz (Hz)
A unit of sound frequency equal to one cycle per second; used to measure pitch.
Hib Disease (Haemophilus Influenza Type B)
A bacterial microorganism that causes several serious, often life-threatening
illnesses, including bacterial meningitis.
Home Instruction
A special education service in which teaching is provided by a specially trained
instructor to students unable to attend school. A parent or guardian must always
be present at the time of instruction. In some cases, the instruction may take
place on a neutral sight and not in the home or school.
Human Immunodeficiency Virus
The virus that causes acquired immune deficiency syndrome (AIDS).
Hydrocephalus
An enlarged head caused by cerebral spinal fluid accumulating in the cranial
cavity; often causes brain damage and severe retardation. A condition present
at birth or developing soon afterward, it can sometimes be treated successfully
with a shunt.
Hyperactivity
Disorganized and disruptive behavior characterized by constant and excessive
movement; also called hyperkinesis.
Hyperlexia
A neurobiological disorder characterized by heightened literacy skills
combined with significant difficulty in understanding verbal language as well as
impaired social skills.
Hyperopia
Farsightedness; condition in which the image comes to a focus behind the retina
instead of on it, causing difficulty in seeing near objects.
Hypertonia
Muscle tone that is too high, resulting in overly tense muscles.
Hypoactivity
Underactivity; child may appear to be in a daze, lacking energy.
Hypotonia
Muscle tone that is too low, resulting in weak muscles.
*See
Reference Information
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