detachable

Etymology

From French détachable, detach + -able

adj

1. Designed to be unfastened or disconnected without damage.
   Pique and linen also accented several coats and oftentimes were both detachable and formed an overcollar covering a collar made from the coat fabric. 1967, Ann Helen Stroup, An Investigation of the Dress of American Children from 1930 Through 1941 with Emphasis on Factors Influencing Change, page 195

noun

1. Any device that is designed so that it can be detached from something else.
   For the past few months, the red HP Pavilion X2 10-n055na has been my pick of the detachables at £249.99. November 5, 2015, Jack Schofield, “Which laptop should we buy for our child?”, in The Guardian