• Trifid (journal)
  Trifid (journal)
  Trifid is a quarterly Czech-language periodical and the official publication of Darwiniana, a carnivorous plant society based in the Czech Republic. Typical articles include matters of horticultural interest, field reports, and scientific studies. The journal was established in 1996. It is...
  
  , a Czech-language periodical
• Trifid Nebula
  Trifid Nebula
  The Trifid Nebula is an H II region located in Sagittarius. Its name means 'divided into three lobes'...
  
   in the constellation Sagittarius
• Trifid cipher
  Trifid cipher
  In classical cryptography, the trifid cipher is a cipher invented around 1901 by Felix Delastelle, which extends the concept of the bifid cipher to a third dimension, allowing each symbol to be fractionated into 3 elements instead of two...
  
  , a fractionated cipher

Distinguish from

• Triffid
  Triffid
  The triffid is a tall, mobile, carnivorous, prolific and highly venomous fictional plant species—the titular antagonist in John Wyndham's 1951 novel The Day of the Triffids and Simon Clark's 2001 sequel The Night of the Triffids....
  
  , a fictional dangerous mobile plant in the 1951 novel The Day of the Triffids by John Wyndham
• The Triffids
  The Triffids
  The Triffids were a seminal Australian alternative rock and pop band formed in Perth, Western Australia, in May 1978 with charismatic, David McComb as singer-songwriter, guitarist, bass guitarist and keyboardist. They achieved negligible success in Australia, but greater success in the U.K...
  
  , a popular Australian band named for the plant