Apple

An apple (Malus domestica) is an edible fruit with a sweet taste; red, green, or even yellow in color. Besides the domestic apple native to Earth, different varieties of apples have been known to be cultivated in otherworldly forms.

The reception hall at the Federation Council meeting hall in San Francisco featured a bowl of apples, one of which was picked up by the Klingon Kelvis. He used the apple, thrown at a high velocity, to render Dav unconscious. (DC TOS volume 2 The Trial of James T. Kirk)