/ay gram"euh tiz'euhm, euh gram"-/ , n. Pathol.
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. Also called agrammaphasia /ay gram'euh fay"zheuh, -zee euh, euh gram"-/ , agrammatica /ag'reuh mat"i ka/ , agrammatologia /ay gram'euh tl oh"jee euh, euh gram'-/ .
[ 1880-85; agrámmat ( os ) illiterate ( a- A- 6 + grammat- (s. of grámma letter) + -os adj. suffix) + -ISM ]