• (RP) IPA: /ˈdɑːnəɫ/

darnel (uncountable)

1. A species of ryegrass, Lolium temulentum, often found in wheat fields and often host to a fungus intoxicating to humans and animals.
   • c. 1603–1606, William Shakespeare, “The Tragedie of King Lear”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act IV, scene vi]:

     With harlocks, hemlock, nettles, cuckoo-flowers, / Darnel, and all the idle weeds that grow / In our sustaining corn.

2. Various species of Lolium, especially as a weed in wheat fields.

• (Lolium temulentum) poison darnel

• French: ivraie enivrante
• German: Taumel-Lolch, Taumellolch, Rauschgras
• Italian: zizzania, loglio
• Portuguese: joio, cizânia
• Russian: пле́вел опьяня́ющий
• Spanish: cizaña, cizaña forrajera, espantapájaros