1. By photometric means
   "photometrically measured"

See also: photometric

• down-and-out
• down-at-heel
• down-at-the-heel
• down-at-the-heels
• down-bow
• down-to-earth
• downbeat
• downbound
• downcast
• downdraft
• downdraught
• downer
• downfall
• downfallen
• downfield
• downgrade
• downhearted
• downheartedness
• downhill
• downiness
• Downing
• Downing Street
• downlike
• downline
• download