The sediment that remains after ground coffee beans have been extracted with hot water.

A subspecies of plum, Prunus domestica subsp. italica.

(biochemistry) That part of a proteome consisting of proteins secreted from a cell

(mathematics) (of an algebra) containing a multiplicative identity element (or unit), i.e. an element 1 with the property 1x = x1 = x for all elements x of the algebra.