Ammonium cation: The cation of molecular formula NH 4 + (i.e., the conjugate acid of ammonia). Can also refer to any cation in which nitrogen has four single bonds and a positive formal charge, such as the tetra methyl ammonium cation.
Arden /ar-den/ [2 sylls.] as a girls' name (also used as boys' name Arden) is pronounced AR-den. It is of Latin origin, and the meaning of Arden is great forest. Literary: the Forest of Arden in Shakespeare's As You Like It was a magically beautiful place.
Arden is an uncommonly occurring first name for females but a very prominent last name for all people (#13434 out of 150436, Top 9%). (2000 U.S. Census). Shown below is a comparison of the usage of Arden and related names. Ardis is the only popular varying form of Arden (outside Top 1000) listed in the Top 1000.