rostro-carinateadj.n.

1912 E. R. Lankester in Philos. Trans. (Royal Soc.) B. 202 295 We distinguish..an anterior surface, narrowed to the form of a keel and ending in a beak (hence we call the implement ‘rostro-carinate’) as a consequence of the oblique direction and convergence of the lateral surfaces, which approach one another so as to leave only a narrow keel-like ridge between them.

1934 Jrnl. Royal Anthropol. Inst. 94 337 Among these large tools (which were afterwards called Sangoan), a number of well-made rostro-carinate forms is to be distinguished.

2003 Proc. Geologists' Assoc. 114 259/2 Lankester now introduced, named and described a new implement type from the sub-Crag: the rostro-carinate or eagle's beak implement.

1919 H. G. Wells Outl. Hist. ix. §2. 50/1 The Mousterian Age implements, and all above it, are those of Neanderthal men or, possibly in the case of the rostro-carinates, of sub-men.

1957 J. K. Charlesworth Quaternary Era II. xxxviii. 1016 The Cromerian implements..are ochreous or orange-brown artefacts, often striated as at East Runton. The tools are usually made from heavy flakes but include rostrocarinates and crude Abbevillean forms.

2007 A. O'Connor Finding Time for Old Stone Age vi. 175 Sollas had attacked the rostro-carinates at a meeting of the British Association at Birmingham in 1913.