The Collaborative International Dictionary of English v.0.48:

Swarmspore \Swarm"spore`\, n.
   1. (Bot.) One of innumerable minute, motile, reproductive
      bodies, produced asexually by certain algae and fungi; a
      zoospore.
      [1913 Webster]

   2. (Zool.) One of the minute flagellate germs produced by the
      sporulation of a protozoan; -- called also zoospore.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Zoospore \Zo"o*spore\, n. [Zoo- + spore.]
   [1913 Webster]
   1. (Bot.) A spore provided with one or more slender cilia, by
      the vibration of which it swims in the water. Zoospores
      are produced by many green, and by some olive-brown,
      algae. In certain species they are divided into the larger
      macrozoospores and the smaller microzoospores. Called also
      sporozoid, and swarmspore.
      [1913 Webster]

   2. (Zool.) See Swarmspore.
      [1913 Webster]

WordNet (r) 3.0 (2006):

zoospore
    n 1: an asexual spore of some algae and fungi that moves by
         means of flagella