Yes. The ammonium ion has a formula of NH4+ and has a positive charge so it is a cation.
What does Asa mean? Asa [asa] as a boys' name (also used less generally as girls' name Asa) is pronounced AY-sah. It is of Hebrew origin, and the meaning of Asa is doctor, healer. Biblical: name of the third king of Judah, who reigned for forty years. Made popular by the Puritans in the 17th century.
Sere has not wandered very far from its origins-it derives from the Old English word sÄar (meaning dry), which traces back to the same ancient root that gave Old High German, Greek, and Lithuanian words for drying out and withering.