Definitions:
a small oval fruit with a hard stone and bitter flesh, green when unripe and bluish black when ripe, used as food and as a source of oil

the small evergreen tree which produces olives and which has narrow leaves with silvery undersides, native to warm regions of the old world.

a greyish-green colour like that of an unripe olive

a slice of beef or veal made into a roll with stuffing inside and stewed.

a marine mollusc with a smooth, roughly cylindrical shell which is typically brightly coloured.

each of a pair of smooth, oval swellings in the medulla oblongata.

a metal ring or fitting which is tightened under a threaded nut to form a seal, as in a compression joint.

greyish-green