Nodule
A small solid collection of tissue, a nodule is palpable (can be felt).
It may range in size from greater than 1.0 cm (3/8 inch) to somewhat less than 2 cm (13/16 inch) in diameter.
A nodule may be present in the epidermis, dermis or subcutis (at any level in the skin).
The word 'nodule' is the diminutive of 'node' (a knot or knob) so a 'nodule' means 'a little knot or knob.'