Dictionary.net

• highly variable often shrubby evergreen oak of coastal zone of western North America having small thick usually spiny-toothed dark-green leaves

2006 - WordNet 3.0
By Princeton University

• highly variable often shrubby evergreen oak of coastal zone of western North America having small thick usually spiny-toothed dark-green leaves

2011 - English Dictionary Database
By DataStellar Co., Ltd