nanism

From nano- +‎ -ism.

nanism (countable and uncountable, plural nanisms)

1. (biology, medicine) Unusually small size, as the result of a developmental abnormality.
   • 2006 April, Henri Friedhofer et al., “Surgical treatment for eyelid deformity in Crouzon syndrome associated with acanthosis nigricans: case report”, in Clinics‎^[1]:

     In this gene, other mutations can cause a kind of nanism that is lethal during the first weeks of life.

• dwarfism
• microsomia

Borrowed from French nanisme. By surface analysis, nan +‎ -ism.

nanism n (uncountable)

1. dwarfism