preneuraladj.n.
/ˌpriːˈnjʊərəl/, /ˌpriːˈnjʊərl̩/, U.S. /priˈn(j)ʊr(ə)l/ A. adj.
1. Zoology. Anterior to a neural element; spec. (in a chelonian) designating a skeletal element that lies between the nuchal bone and the neural bones.
ΘΚΠ
the world > animals > reptiles > order Chelonia (turtles and tortoises) > [adjective] > of parts of
plastral1889
preneural1900
1900 Science 30 Nov. 825/1 The chief distinctive characters of this family [of gastropod molluscs]..appear..to be..the development of a very large œsophageal cæcum..and two pairs of preneural salivary glands.
1904 Amer. Jrnl. Sci. 168 274 There is a preneural bone, whose anterior border has occupied a notch in the hinder border of the nuchal.
1944 Amer. Midland Naturalist 31 585 The preneural plate is wider than long.
1998 Trans. Amer. Philos. Soc. 88 182 The fragment of costal 1..indicates the presence of a preneural bone as in Aspideretes.
2. Biology. Designating or relating to a process which precedes a neural one, or which (in evolutionary or developmental terms) represents a stage prior to a fully developed nerve cell or nervous system.
ΚΠ
1929 Q. Rev. Biol. 4 593/2 There is..an overlapping of the preneural system of integration upon the neural in the course of development.
1966 Science 30 Dec. 1682/2 In teleosts as well as in amphibia, it would appear that lens induction comprises..a preneural phase in which entoderm and mesoderm are the inductors.
1995 W. P. Fifer et al. Fetal Devel. 213 Instead of being inhibited by the aquatic conditions of stimulation, the preneural events leading to chemosensory transduction may be facilitated in the fetus.
B. n.
Zoology. A preneural bone in a chelonian.
ΘΚΠ
the world > animals > reptiles > order Chelonia (turtles and tortoises) > [noun] > member of > parts of
preneural1908
1908 O. P. Hay Fossil Turtles N. Amer. (Carnegie Inst. Washington Publ. No. 28) 57 In Chisternon there intervenes between the nuchal bone and the first neural a large bone that is not present in Baëna... This the [present] writer calls the preneural.
1957 Bull. Mus. Compar. Zoöl. Harvard 115 171 The very similar term ‘pre-neural’ has long been in use for an element that is immediately posterior to the nuchal.
1998 Trans. Amer. Philos. Soc. 88 180 We use the name Aspideretes for the trionychid fossils with a preneural as a form genus of unestablished taxonomic status.
This entry has been updated (OED Third Edition, March 2007; most recently modified version published online March 2022).
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adj.n.1900