halecoidn.adj.
/ˈhalᵻkɔɪd/, U.S. /ˈhæləˌkɔɪd/ Ichthyology. Now rare.
A. n.
Originally: a ray-finned fish of the (former) group Halecoides, comprising clupeoid and salmonoid fishes. In later use: an extinct teleost fish of the suborder Halecoidei.
ΚΠ
1842 W. T. Brande Dict. Sci., Lit. & Art 554/1 The genus Clupea is so nearly allied to the genus Salmo that they are both included in the same natural family, under the name of Halecoids, by M. Agassiz.
1866 Ann. & Mag. Nat. Hist. 18 244 A figure almost exactly like that of a Halecoid.
1887 Sci. Trans. Royal Dublin Soc. 3 585 The bones of the trunk are considered to resemble in their arrangement and complication the living Halecoids.
1965 D. Bardack Anat. & Evol. Chirocentrid Fishes 6/2 These fossils were not assigned to the Chirocentridae but referred to such diverse groups as halecoids, sphyraenoids (barracudas), sauroids, or clupeids (herrings).
1969 Bull. Brit. Mus. (Nat. Hist.): Geol. Suppl. No. 7. 201 It is apparent that the halecoids..are related only in so far as they are contemporary descendants from an earlier stock within the Salmoniformes.
2009 Jrnl. Vertebr. Paleontol. 29 655/1 The palatal teeth of halecoids..are very small relative to the head size.
B. adj.
Of or relating to the (former) group Halecoides or the (current) suborder Halecoidei; (also) designating this group or suborder.
ΚΠ
1845 R. Owen Odontography I. i. i. 5 The fishes of the Halecoid tribe..afford examples in the present class.
1861 Proc. Acad. Nat. Sci. Philadelphia 1860 21 Dr. Dekay has described a halecoid fish to which he has given the name of Alosa teres.
1895 D. L. Morgan tr. B. Fries et al. Hist. Scand. Fishes ii. 826 The osseous framework of the mouth follows the Halecoid type.
2010 Jrnl. Vertebr. Paleontol. 30 1343/1 There are several fossil aulopiform taxa, including..a dercetid, and possibly two halecoid species.
This entry has been updated (OED Third Edition, June 2019; most recently modified version published online March 2022).
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n.adj.1842