chemiluminescent compound that, when sprayed on even trace amounts of blood, reacts with the iron in the hemoglobin and causes the blood spot to glow with a blue light; effective even on surfaces that have been wiped clean of visible blood.
the luminol was sprayed on the car seat, and blood was found.
by forensics geek November 27, 2003

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from daily@urbandictionary.com. We'll never spam you.

×