Tetraspore

from WordNet (r) 3.0 (2006)

tetraspore
    n 1: one of the four asexual spores produced within a sporangium

from The Collaborative International Dictionary of English v.0.48

Tetraspore \Tet"ra*spore\, n. [Tetra- + spore.] (Bot.)
   A nonsexual spore, one of a group of four regularly occurring
   in red seaweeds. -- {Tet`ra*spor"ic}, a.
   [1913 Webster]