A tree with edible fruit, Sorbus torminalis, native to central and southern Europe and neighboring parts of Asia and Africa.

(slang) Crazy; unhinged; irrational.

(idiomatic) Crazy; unhinged; irrational.

Cassia fistula, a flowering plant in the family Fabaceae.

A spanning tree that has minimum possible weight for a given graph

A large Asian tree with corky bark, grown ornamentally in colder climates and used in traditional Chinese medicine, Phellodendron amurense

(soccer) A formation consisting of four defenders, three central midfielders, two attacking midfielders, and one striker.

plural of Christmas tree formation

(mathematics, computing) A binary tree in which each node has exactly two or zero children.

A tree, Erythrina variegata, native to the tropical and subtropical regions of eastern Africa, the Indian Subcontinent, northern Australia, and the islands of the Indian Ocean and the western Pacific Ocean east to Fiji.