noun, plural Nan·dis, (especially collectively) Nan·di for 1.
Examples from the Web for nandi
Nandi is the divine Bull, on which, or whom, the Great God rides.The Substance of a Dream |F. W. Bain
The bull Nandi (emblem of generative force), as also the lingham, are among his emblems.Ophiolatreia|Anonymous
Occasionally a rude figure of the bull Nandi, and an iron trident mark the shrine.Castes and Tribes of Southern India|Edgar Thurston
Once Nandi belonged to a Hindu prince and walked in long processions through the streets of cities.
In the first place Nandi was large, as you have already guessed.