Definition of fuller's teasel in English:

fuller's teasel

noun

  • A teasel with stiff bracts which curve backwards from the prickly flower head.

    • ‘Hence, the fuller's teasel is called ‘sativus’ and the roadside teasel is called ‘fullonum.’’
    • ‘The fuller's teasel is regarded as a cultivated form of the wild teasel Dipsacus fullonum L. ssp fullonum.’

Origin

So named because it was formerly dried and used for raising the nap on woven cloth.