thorn

[θɔːn]
n
a sharp pointed woody extension of a stem or leafSee prickle
any of various trees or shrubs having thorns, esp the hawthorn.the wood of any of these plants
short for thorn moth
a Germanic character of runic origin Þ used in Old and Modern Icelandic to represent the voiceless dental fricative sound of th, as in thin, bath. Its use in phonetics for the same purpose is now obsoleteSee theta
this same character as used in Old and Middle English as an alternative to edh, but indistinguishable from it in function or soundSee edh
any of various sharp spiny parts
a source of irritation (esp in the phrases a thorn in one's side or flesh)