• (n.) A supposed spongelike expansion of the tip of a rootlet for absorbing water; -- called also spongelet.
Spon'gi·ole noun [ Latin spongiola a rose gall, small roots, dim. of spongia : confer French spongiole .] (Botany) A supposed spongelike expansion of the tip of a rootlet for absorbing water; -- called also spongelet .