(biology) A sex chromosome inactivated by packing in heterochromatin.

The characteristic of being blissful.

The end for which something is done, is made or exists. / The reason for which something is done, or the reason it is done in a particular way. / Function, role.

A thin sheet of silver, e.g. used in metalworking or jewellery. / (colloquial, dated, 1920s-1940s) A cinema screen onto which movies are projected.