The Unicode standard just specified a "wheel". A particular amusing (read: drama inducing) case is with the ๐ซ emoji: Unicode specified it as "Pistol", but depending on your font (and version), it can either appear as a water gun, or a musket or revolver.
Unfortunately (or maybe fortunately), all major vendors have now switched over to a water gun, so no more amusing forum threads cases by the different meanings.
So in addition to the interpretation being unclear, there is also no real standard for emoji.