\Spa"dix\, n.; pl. L. {Spadices}, E. {Spadixes}. [L., a
palm branch broken off, with its fruit, Gr. ?.]
1. (Bot.) A fleshy spike of flowers, usually inclosed in a
   leaf called a spathe.
2. (Zo["o]l.) A special organ of the nautilus, due to a
   modification of the posterior tentacles.