The Collaborative International Dictionary of English v.0.48:

Mero de lo alto \Me"ro de lo al"to\, and a species called also
   rock hind, distinguished as Mero cabrolla \Me"ro
ca*brol"la\.
   [Webster 1913 Suppl.] Meroblast \Mer"o*blast\, n. [Gr. me`ros
   part + -blast.] (Biol.)
   An ovum, as that of a mammal, only partially composed of
   germinal matter, that is, consisting of both a germinal
   portion and an albuminous or nutritive one; -- opposed to
   holoblast.
   [1913 Webster]