A bone spur (osteophyte) is a bony growth formed on normal bone. Most people think of something sharp when they think of a spur, but a bone spur is just extra bone. It's usually smooth, but it can cause wear and tear or pain if it presses or rubs on other bones or soft tissues such as ligaments, tendons, or nerves in the body.
An immediate or cancel order (IOC) is an order to buy or sell a security that must be executed immediately, and any portion of the order that cannot be immediately filled is cancelled.
Cancel, delete, erase, obliterate indicate that something is no longer to be considered usable or in force. To cancel is to cross something out by stamping a mark over it, drawing lines through it, or the like: to cancel a stamp, a word. To delete is to cross something out from written matter or from matter to be printed, often in accordance with a printer's or proofreader's symbol indicating the material is to be omitted: to delete part of a line.