Dictionary.net

• comprising the lichens which grow symbiotically with algae; sometimes treated as an independent group more or less coordinate with Algae and Fungi

2006 - WordNet 3.0
By Princeton University

• comprising the lichens which grow symbiotically with algae; sometimes treated as an independent group more or less coordinate with Algae and Fungi

2011 - English Dictionary Database
By DataStellar Co., Ltd