> as lemmas

1889 B. G. Wilder in A. H. Buck Ref. Handbk. Med. Sci. VIII. 121/2 Any communication with the ectal surface is presumably artificial, excepting only the metapore (‘Foramen of Magendie’).

1912 B. G. Wilder in Science 3 May 692/1 The prefix lends itself readily to useful and euphonious compounds [such as] metapore (‘Foramen of Magendie’).

1994 F. P. Bigey in P. J. Hayward et al. Biol. & Palaeobiol. Bryozoans 16 The outline of metapore openings changes from subcircular to suboval.

2010 S. Cavalheiro et al. in C. Mallucci & S. Sgouros Cerebrospinal Fluid Disorders i. 20 Initial observations on human fetal material suggested that the metapore appeared in the fifth month.