describe wha sweetbreads are.
In the meat market when you ask for sweetbreads, what are they called in Spanish?
5 Answers

The thymus gland of the cow. It is found at the base of the brain.
Inspired by Qfreed's answer, I'd like to offer this additional reference, which won't add anything new to the answer, but is fairly amusing (and I think very true).
Ok, so what do you call the "sweetbreads" that are actually sweet bread? (with fruits and stuff - not fruitcake) My family makes it...cultural thing. Am I alone here?
At $36.00 a lb I'd say expensive, is a good description
sweetbreads in English Yuck!
Lechecillas es el término gastronómico para el timo y el páncreas, especialmente de ternera y cordero (si bien también se consumen los de buey y cerdo). A veces se llama a esta asadura blanca mollejas, término que también alude a una parte del intestino de ciertos vertebrados.