1. Of dark grey
   - black-grey [Brit, Cdn], black-gray [US], blackish-gray [US]

See also: achromatic, neutral

• Polybotrya
• Polybotrya cervina
• polybutene
• polybutylene
• polycarbonate
• Polycarp
• William Mitchell
• William Morris
• William Nunn Lipscom Jr.
• William of Occam
• William of Ockham
• William of Orange
• William of Wykeham
• William Patterson
• William Penn
• William Penn Adair Rogers
• William Pitt
• William Ralph Inge
• William Randolph Hearst
• William Rehnquist
• William Richard Morris
• William Rose Benet
• William Rowan Hamilton
• William Rufus
• William S. Burroughs