simple past tense and past participle of drop in

an apple cider made from frozen apples harvested after freezing winter weather has descended on the orchard.

present participle of drop in

The action of one who drops in.

plural of in-joke

(computing theory) Alternative spelling of inorder

Holding a formal position of employment or appointment.

plural of index fossil

(of sitting) Cross-legged.

Alternative form of in a one-er