> as lemmas

1854 R. Owen Struct. Skeleton & Teeth in Orr's Circle Sci.: Org. Nature I. 172 Giving the first indication of the segmental character of the skeleton.

1856 T. Williams in Philos. Trans. (Royal Soc.) (1859) 148 93 Under the appellation of the ‘segmental organ’, accordingly, it is proposed to describe that viscus upon the basis of which..are always ingrafted the true generative structures [in Annelids].

1872 J. D. Everett Deschanel's Elem. Treat. Nat. Philos. IV. Index 1067/3 Segmental vibration, 832.

1879 F. M. Balfour in Q. Jrnl. Microsc. Sci. XIX. 8 The first part of the urino-genital system to develop is the segmental duct (Vornieregang of Fürbringer), which is formed by a groove~like invagination of the peritoneal epithelium.

1888 T. H. Huxley & H. N. Martin Course Elem. Biol. i. 169 The prorenal (segmental) duct.

1888 T. H. Huxley & H. N. Martin Course Elem. Biol. iii. 244 These [excretory] organs, being thus segmentally arranged, are termed segmental organs or nephridia.

1898 New Sydenham Soc. Lexicon Segmental organ, an organ consisting of a primitive epithelium-lined tubule opening at one end on the body-surface, and at the other into the cœlom or body-cavity. It is the type of the primitive kidneys.

1917 Jrnl. Compar. Neurol. 28 216 It is becoming increasingly evident that the key to this difficult question is to be sought in the subcortical centers of the primitive types, that is, in the ‘old brain’ (palaeencephalon of Edinger, segmental apparatus of Adolf Meyer).

1974 D. Webster & M. Webster Compar. Vertebr. Morphol. xi. 240 Segmentation in the developing brain is neither as regular nor as apparent as it is in the spinal cord. However, during early development (at least), segmentation can be determined in the basal portion, which is, therefore, known as the ‘segmental apparatus’.