Llaç... I am sure that you are more intrigued of the last letter of the word than the meaning of the word, I am right? /ʎæs/
First of all, I will tell you what does Llaç mean, Lace; a netlike fabric of threads made by hand or machine, often used for decoration. I used to wear them on my ponytails when I was little, sadly it was fashionable on that moment (I am still asking why...!).
Now I'll tell you a little of the "curious" letter Ç. We call it c trencada, (it means broken c) and is used before a, o, u and in the middle or the end of the word. I am sure you know how to pronounce it, because ç is used in the famous team Barça! ;)