Talk:periodic tables

There is no problem in 'periodic tables' grammatically. But do we really need it in a dictionary? Staatsschreiber (talk) 20:15, 2 July 2015 (UTC)

It's the plural of periodic table, a set phrase. "I've seen several types of periodic tables, but never one like that." —ObsequiousNewt (εἴρηκα|πεποίηκα) 04:06, 3 July 2015 (UTC)