ESL teachers require a bachelor's degree as well as an ESL teaching certificate. In some states, ESL adult instructors need to gain certification. Typically, a high school diploma is required to work as an ESL private tutor.
Anion Definition: An ionic species having a negative charge. Anion Examples: free chloride in an aqueous table salt (NaCl) solution, singlet oxygen. Table of Common Anions. Return to the Chemistry Glossary Index. By Anne Marie Helmenstine, Ph.D.
circum-. 1. word-forming element meaning around, all around, on all sides, from Latin circum- a common element in word-formation, from adverb and preposition circum around, round about, literally in a circle, probably accusative form of circus ring (see circus).