Definitions

1. noun

A genus of nitrogen-fixing bacteria, especially those of the species Azotobacter chroococcum, which are found in soil and are used as a source of nitrogen in agriculture.

“The farmer applied azobacter to his field to enhance its fertility.”

2. noun

A type of bacteria that can fix atmospheric nitrogen into a form that can be used by plants.

“The scientist studied the behavior of azobacter in soil ecosystems.”