Almost all people with disproportionate dwarfism have normal intellectual capacities. Rare exceptions are usually the result of a secondary factor, such as excess fluid around the brain (hydrocephalus). The most common cause of dwarfism is a disorder called achondroplasia, which causes disproportionately short stature. This disorder usually results in the following: An average-size trunk. Short arms and legs, with particularly short upper arms and upper legs.
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â¢ NB (noun). The noun NB has 2 senses: 1. a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium. 2. a Latin phrase (or its abbreviation) used to indicate that special attention should be paid to something.