triffidian

From triffid +‎ -ian.

triffidian (comparative more triffidian, superlative most triffidian)

1. Resembling or relating to triffids ("a fictional plant able to move around and kill people with a poisonous stinger").

   Synonym: triffidlike

   • 1951, John Wyndham, The Day of the Triffids, Harmondsworth: Penguin Books, published 1954, page 45:

     It was assumed, consequently, that their characteristic of suddenly losing their immobility and rattling a rapid tattoo against the main stem was some strange form of triffidian amatory exuberance.

   • 1989, Ann Morrow, Picnic in a Foreign Land: The Eccentric Lives of the Anglo-Irish, London;  […]: Grafton Books, →ISBN, page 164:

     Some stayed on in the old house and, with consummate dignity, would totter down avenues choked with weeds and brambles which grow at a triffidian rate in Ireland, to a servant's cottage pretending to inquire about the ancient groom's.

• “triffidian, adj.” under “triffid, n.”, in OED Online ⁠, Oxford: Oxford University Press, launched 2000.
• Jesse Sheidlower, editor (2001–2026), “triffidian, adj.”, in Historical Dictionary of Science Fiction.