Definition of microencephalous in English:
microencephalous
(also micrencephalous)
adjective ˌmʌɪkrəʊɛnˈsɛf(ə)ləsˌmʌɪkrəʊɛnˈsɛfələsˌmʌɪkrɛnˈkɛfələs
Medicine rare Origin
Late 19th century; earliest use found in The Century Dictionary. From micro- + encephalous.