Submitted by György Chityil ... on Sat, 01/20/2018 - 01:10 Hierarchy: NounDescription: {{ecology}} the six elements most used by life; carbon, hydrogen, oxygen, nitrogen, phosphorus and sulfurNgram: the big sixNgram Text: the big sixSource: WiktionaryIssue: 0Wiktionary tag: ecologyNgram Count: 3