black knot
noun
1 Irish English a knot which is difficult to undo (now rare ).
2A fungal disease of fruit trees characterized by the formation of irregularly shaped rough black swellings on the bark; (also, more fully black knot fungus) any of several fungi causing this disease, especially Dibotryon morbosum, chiefly affecting plum and cherry trees.
Origin
Mid 19th century; earliest use found in Irish Penny Journal.
- knock something into a cocked hat
- knock something off
- knock something on the head
- knock something out
- knock something over
- knock something together
- knock something up
- knock spots off
- knock the bottom out of
- knock the socks off
- knock up
- knockwurst
- knodden
- knogged
- Knole sofa
- knoll
- knoop
- knop
- Knopf, Alfred A.
- knopper gall
- Knossos
- knot
- knot garden
- knotgrass
- knothole