the larva of any of several darkling beetles of the genus Tenebrio, which infests granaries and is used as food for birds and animals.
Origin of mealworm
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
the larva of various beetles of the genus Tenebrio, esp T. molitor, feeding on meal, flour, and similar stored foods: family Tenebrionidae
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