# What does the suffix in the word nitrogenous mean?

.......typically, it contains nitrogen in a usable form. And when we use the term for say $\text{nitrogenous fertilizers}$, we indicate the presence of nitrogen containing salts, e.g. $\text{nitrate}$ or $\text{ammonium}$ salts, i.e. $N {O}_{3}^{-}$ and $N {H}_{4}^{+}$ salts respectively, which are in a usable form to form proteins.