a bristletail, Thermobia domestica, that lives in areas around furnaces, boilers, steampipes, etc.
Origin of firebrat
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a small primitive wingless insect, Thermobia domestica, that occurs in warm buildings, feeding on starchy food scraps, fabric, etc: order Thysanura (bristletails)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012