menˈtiferous,a. [Formed as prec. + -ferous.] Proposed as the epithet of an imagined ‘ether’ in which ‘thought-waves’ are propagated. 1884Gurney & Myers in Proc.Soc.Psych. Research I. vi. 135 The transformation [by Dr. Maudsley] of ‘brain-wave’ into the more ambitious ‘mentiferous ether’.