What does "separable" mean?

Separable: Capable of being separated, disjoined, disunited, or divided; as, the separable parts of plants; qualities not separable from the substance in which they exist. -- Sep"a*ra*ble*ness, n. -- Sep"a*ra*bly, adv. Trials permit me not to doubt of the separableness of a yellow tincture from gold. Boyle.