mullein

UK: /ˈmʌlɪn/ US: (mul′ən)

WordReference Random House Unabridged Dictionary of American English © 2026

mul•lein  (mul′ən), n. 

1. Plant Biology any of various plants belonging to the genus Verbascum, of the figwort family, native to the Old World, esp. V. thapsus, a tall plant with woolly leaves and a dense spike of yellow flowers.
2. Plant Biology any of several similar plants.

Also, mul′len. 

• Latin mollis
• Anglo-French, perh. derivative of mol soft
• Middle English moleine 1325–75

Collins Concise English Dictionary © HarperCollins Publishers::

mullein, mullen / ˈmʌlɪn/ noun

1. any of various European herbaceous plants of the scrophulariaceous genus Verbascum, such as V. thapsus (common mullein or Aaron's rod), typically having tall spikes of yellow flowers and broad hairy leaves
   See also Aaron's rod

Etymology: 15th Century: from Old French moleine, probably from Old French mol soft, from Latin mollis