adiadochokinesia

[ ad-ee-ad-uh-koh-ki-nee-zhuh, -zhee-uh, -zee-uh, -kahy-nee- ]
/ ˌæd iˌæd ə koʊ kɪˈni ʒə, -ʒi ə, -zi ə, -kaɪˈni- /

noun Medicine/Medical.

the inability to perform rapidly alternating muscular movements, as flexion and extension.
Also ad·i·ad·o·cho·ki·ne·sis [ad-ee-ad-uh-koh-ki-nee-sis, -kahy-nee-] /ˌæd iˌæd ə koʊ kɪˈni sɪs, -kaɪˈni-/, ad·i·ad·o·ko·ki·ne·sia, ad·i·ad·o·ko·ki·ne·sis.
Compare diadochokinesia.

Origin of adiadochokinesia

a-6 + Greek diádocho(s) successor ( dia- dia- + doch-, variant stem of déchesthai to receive + -os adj. suffix) + -kinesia