a drop of sheep or goats' dung, a drop or globule; cf. Irish caoirín, a little berry, little sheep, from caor, berry, caora, sheep. The two ideas seem confused in Gaelic. In Argyle, gaoirnean; (Arg. ao here is northern ao). From skar, sharn?
Etymological dictionary of the Gaelic language.
Alexander Gairm Publications.
1982.