• (n.) A bird of the genus Anastomus, allied to the stork; -- so called because the two parts of the bill touch only at the base and tip. One species inhabits India, another Africa. Called also open-beak. See Illust. (m), under Beak. Found on http://thinkexist.com/dictionary/meaning/openbill/
O'pen·bill` noun (Zoology) A bird of the genus Anastomus , allied to the stork; -- so called because the two parts of the bill touch only at the base and tip. One species inhabits India, another Africa. Called also open- beak . See Illust. (m) , under Beak . ... Found on http://www.encyclo.co.uk/webster/O/23