Sentence:  Underneath the big one , in the silent moonlight , lay a dead pigeon , and on the smaller bell , the Clemence , two gray and <WSD>white</WSD> birds slept huddled together in the cold winter air . 
Meaning of the word marked with <WSD> tags:  being of the achromatic color of maximum lightness; having little or no hue owing to reflection of almost all incident light