NOUN (1)

1. a device (as an earring, sunglasses, microphone etc.) that is attached by clips;


ADJECTIVE (1)

1. attachable by a clip;
- Example: "clip-on earrings"
- Example: "a clip-on bow tie"

The Collaborative International Dictionary of English v.0.48:

clip-on \clip-on\ adj.
   having a clip as the means of attachment; as, clip-on
   earrings; a clip-on bow tie.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

clip-on
    adj 1: attachable by a clip; "clip-on earrings"; "a clip-on bow
           tie"
    n 1: a device (as an earring, sunglasses, microphone etc.) that
         is attached by clips