Pentachenium

1 definition found

From The Collaborative International Dictionary of English v.0.48 [gcide]:

  Pentachenium \Pen`ta*che"ni*um\, n. [NL. See {Penta-}, and
     {Achenium}.] (Bot.)
     A dry fruit composed of five carpels, which are covered by an
     epigynous calyx and separate at maturity.
     [1913 Webster]