monostome
/ˈmɒnə(ʊ)stəʊm/Zoology
adjective
Having a single mouth or mouthlike structure; specifically (of a digenean trematode) lacking a ventral sucker and having only an oral sucker.
noun
An animal with a single mouth or mouthlike structure; specifically a monostome trematode.
Origin
Mid 19th century; earliest use found in Thomas Huxley (1825–1895), biologist and science educationist. From scientific Latin monostomus; compare -stome. In specific noun use after scientific Latin Monostoma, former genus name of a trematode (J. A. E. Goeze (ed. J. H. G. Zeder) Erster Nachtrag zur Naturgeschichte der Eingeweidewürmer 147). Compare French monostome, adjective and noun.