dysgraphia
noun
dys·graph·ia (ˌ)dis-ˈgra-fē-ə 
: impairment of handwriting ability that is characterized chiefly by very poor or often illegible writing or writing that takes an unusually long time and great effort to complete
Note: When present in children, dysgraphia is classified as a learning disability. When it occurs as an acquired condition in adults, it is typically the result of damage to the brain (as from stroke or trauma).
Example Sentences
Recent Examples on the Web Vutpakdi's son is part of a rare group known as twice exceptional, or 2e — children who have high IQs of over 130, but who also face challenges such as attention deficit disorder, autism, dyslexia or dysgraphia, the inability to write clearly. 
Caitlin Yoshiko Kandil, latimes.com, 2 Mar. 2018
Caitlin Yoshiko Kandil, latimes.com, 2 Mar. 2018 Word History
Etymology
dys- + Greek -graphia "writing" (from gráphein "to write" + -ia -ia entry 1), probably after French dysgraphie — more at carve
First Known Use
1892, in the meaning defined above
Medical Definition
dysgraphia
noun
dys·graph·ia (ˈ)dis-ˈgraf-ē-ə
: impairment of handwriting ability that is characterized chiefly by very poor or often illegible writing or writing that takes an unusually long time and great effort to complete
Note: When present in children, dysgraphia is classified as a learning disability. When it occurs as an acquired condition in adults, it is typically the result of damage to the brain (as from stroke or trauma).