whitethorn

Short definition from Wiktionary

Noun

1. 1
   Crataegus monogyna, a hawthorn species native to Europe, northwest Africa and western Asia.
2. 2
   Bursaria spinosa, a small Australian shrub.
3. 3
   Vachellia constricta, formerly Acacia constricta, whitethorn acacia, a shrub in the family Fabaceae.
4. 4
   Senegalia polyacantha, of India
5. 5
   Ceanothus leucodermis, chaparral whitethorn, a shrub in the family Rhamnaceae.

Proper noun

1. 1
   An unincorporated community in Humboldt County, California, USA; formerly, Thorn.