The Collaborative International Dictionary of English v.0.48:

Plurilocular \Plu`ri*loc"u*lar\, a. [Pluri- + locular.]
   Having several cells or loculi; specifically (Bot.), having
   several divisions containing seeds; as, the lemon and the
   orange are plurilocular fruits.
   [1913 Webster]

   Plurilocular sporangia (Bot.), many-celled sporangia, each
      cell containing a single spore, as in many alg[ae].
      [1913 Webster]