adder's-tongue (plural adder's-tongues)
- Any of a genus of ferns (Ophioglossum), whose spores are produced on a spike resembling a serpent's tongue.
- The yellow dogtooth violet.
- (Can we find and add a quotation of Gray to this entry?)
Part or all of this entry has been imported from the 1913 edition of Webster’s Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.