Cottise and Cottising
The cottise (the spelling varies—sometimes only one t and sometimes c instead of the s) originated as an alternative name to cost (see above) and so as a diminutive of the bend, most commonly found in pairs on either side of a bend, with the bend being blazoned either as between two cottises or as cottised.
Nowadays cottising is used not just for bends but for practically all the ordinaries (and occasionally collections of charges), and consists in placing the ordinary between two diminutive versions of itself (and occasionally other things). A pale so treated is usually blazoned endorsed and a chevron very occasionally couple closed or between two couple closes.
The ordinary and its cottices need not have the same tincture or the same line ornamentation.
Ordinaries very occasionally get cottised by things shaped quite differently from their diminutives—like demi maple leaves.
Occasionally a collection of charges aligned as if on an ordinary—in bend, etc.—is accompanied by cotticing.
Read more about this topic: Ordinary (heraldry)