The word 'passcode' is correct and usable in written English.
You can use it when referring to a code (usually a combination of numbers or letters) required to gain access to something, such as a website. For example: "To gain access to this website, please enter the correct passcode."
Apple's first smartwatch has a passcode feature that can lock the wearable device when it is removed from the wrist, which is meant to prevent it from being used without permission.
This usually involves charging up mobiles and looking for a contact named "mum", though if the phone has a passcode the only way to identify it is with the IMEI number.
However, while the passcode lock prevents access to personal data stored on the watch, it does nothing to stop a thief from resetting the Apple Watch back to factory settings and reactivating it.
America has lagged behind other rich economies in adopting chip-and-PIN cards, for which a passcode must be entered to authorise each transaction.
It can often make you want to change your life to be like them... but for now, a duvet and a passcode is all you need.
A very quick workaround, which uses Siri, lets people into the phone even if the passcode and Touch ID fingerprint sensor is turned on.
However, for a group of students from Central Saint Martins, this somewhat seedy-sounding phrase is the passcode to "make sex more awesome".
And once you've got used to not typing in your passcode, keeping your phone secure isn't a chore.
Anyone without the passcode for the device, including Apple itself, cannot access the phones, the company told a federal judge in Brooklyn, New York.
The announcement comes less than a day after Apple announced similar measures, updating the security protocol for iOS 8 so that information stored on devices can only be unlocked using the customer's passcode.
Many email systems require a phone to use a passcode lock but touch the Touch ID sensor and it recognises you and unlocks the phone.
