adder's tongue

/ˌædərz ˈtʌŋ/

Definitions of adder's tongue

1. noun

   ferns with fertile spikes shaped like a snake's tongue
   synonyms: adder's tongue fern

   types:

   Ophioglossum pendulum, ribbon fern

   epiphytic fern with straplike usually twisted fronds of tropical Asia and Polynesia and America

   type of:

   fern

   any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores