• (a.) Prominent, or excessively prominent; bulging beyond the surrounding or adjacent surface; swelling; as, a protuberant joint; a protuberant eye. Found on http://thinkexist.com/dictionary/meaning/protuberant/
Pro·tu'ber·ant adjective [ Latin protuberans , -antis , present participle of protuberare . See Protuberate .] Prominent, or excessively prominent; bulging beyond the surrounding or adjacent surface; swelling; as, a protuberant joint; a protuberant eye. -- Found on http://www.encyclo.co.uk/webster/P/182