agrammatism

[ey-gram-uh-tiz-uh m, uh-gram-]

noun Pathology.

a type of aphasia, usually caused by cerebral disease, characterized by an inability to construct a grammatical or intelligible sentence while retaining the ability to speak single words.

Origin of agrammatism

1880–85; < Greek agrámmat(os) illiterate (a- a-⁶ + grammat- (stem of grámma letter) + -os adj. suffix) + -ism

Also called a·gram·ma·pha·sia

[ey-gram-uh-fey-zhuh, -zee-uh, uh-gram-] /eɪˌgræm əˈfeɪ ʒə, -zi ə, əˈgræm-/, ag·ram·mat·i·ca

[ag-ruh-mat-i-ka] /ˌæg rəˈmæt ɪ kæ/, a·gram·ma·to·lo·gi·a

[ey-gram-uh-tl-oh-jee-uh, uh-gram-] /eɪˌgræm ə tlˈoʊ dʒi ə, əˌgræm-/.

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Agrammatism in child-language always appears in company with acataphasia, often also in insane persons.
The Mind of the Child, Part II
W. Preyer

agrammatism in Medicine

(ā-grăm′ə-tĭz′əm, ə-grăm′-)

A form of aphasia characterized by the inability to produce a grammatical or intelligible sentence.