layer
1. lay.er \'la--*r, 'le(-*)r\ \'la--*rd, 'le(-*)rd\ n 1: one that lays (as a workman who lays brick or a hen that lays eggs) 2a: one thickness, course, or fold laid by lying over or under another 2b: STRATUM 2c: HORIZON 3a: a branch or shoot of a plant treated to induce rooting while still atta ched to the parent plant 3b: a plant developed by layering - lay.ered aj 2. layer vt : to propagate (a plant) by means of layers 1: to separate into layers of a plant 2: to form roots where a stem comes in contact with the ground
Webster's English Dictionary