The Collaborative International Dictionary of English v.0.48:

Scorpioid \Scor"pi*oid\, Scorpioidal \Scor`pi*oid"al\, a. [Gr.
   ?; ? a scorpion + e'i^dos form.]
   1. Having the inflorescence curved or circinate at the end,
      like a scorpion's tail.
      [1913 Webster]