univalveadj.n.
/ˈjuːnɪvalv/, U.S. /ˈjunəˌvælv/ Natural History.
A. adj.
a. Conchology. Of molluscs: Having a shell consisting of one valve. Of shells: Composed of a single valve or piece.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [adjective] > of parts of molluscs > of shell or parts of shell > having shell of a particular type
univalve1661
1661 R. Lovell Πανζωορυκτολογια, sive Panzoologicomineralogia Isagoge sig. A7v Fishes, which..are, turbinate,..bivalve,..or univalve.
1752 J. Hill Gen. Nat. Hist. III. 115 The first [series of shellfish] containing those formed of only one piece; this I shall call the simple ones; others have called them univalve ones.
1774 Philos. Trans. (Royal Soc.) 65 46 The smallest univalve or testaceous animal of any such kind.
1816 W. Smith Strata Identified 27 Bivalve shells [are] most common to the thick beds; univalve to the thin.
1851 T. Wright & G. F. Richardson Introd. Geol. (new ed.) viii. 230 When they have a shell it is thin, fragile, and univalve.
1872 W. S. Symonds Rec. Rocks vi. 181 A univalve mollusk.
b. Entomology, Zoology, and Botany. Having one valve.
ΘΚΠ
the world > animals > invertebrates > phylum Arthropoda > class Insecta > order Diptera or flies > [adjective] > having one valve
univalve1826
1826 G. Samouelle Gen. Direct. collecting Exotic Insects & Crustacea 54 Proboscis [of Diptera] (rarely wanting) univalve.
B. n.
Conchology. A univalve mollusc or shell.
ΘΚΠ
the world > animals > invertebrates > subkingdom Metazoa > grade Triploblastica or Coelomata > phylum Mollusca > [noun] > Testacea (shelled molluscs) > shelled mollusc
turbo1661
univalve1668
scale-shell1713
turbinate1802
testacean1842
thorn-shell1860
stump1875
ecardine1878
1668 Bp. J. Wilkins Ess. Real Char. 129 Venus Shell..being of near affinity to the Univalvs.
1684 Philos. Trans. (Royal Soc.) 14 507 Distinction of shells into Univalves, Bivalves, and Turbinated.
1755 Gentleman's Mag. Jan. 32/2 When a shell, therefore, is found to be a Univalve.
1785 Philos. Trans. (Royal Soc.) 75 342 The univalves..have the intestine reflected back.
1832 C. Lyell Princ. Geol. (ed. 2) II. 110 Aquatic univalves usually attach their eggs to leaves and sticks.
1854 C. Kingsley Lett. (1878) I. 411 The crevices of the highest rocks..have their peculiar little univalves.
1879 tr. Sempter's Anim. Life 41 Animals..as low in the scale as the Amphibia or Univalves.
Derivatives
uniˈvalvate adj. Botany having or consisting of one valve.ⓘ
ΚΠ
1810 Encycl. Londinensis I. 801/1 Calyx: involucre proper univalvate; valvelet lanceolate, [etc.].
uniˈvalved adj. Botany having or consisting of one valve.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > seed-vessel or pericarp > [adjective] > having or between divisions or sections
bivalve1737
valved?1768
trivalvular1785
multivalve1793
univalvular1793
univalved1823
bivalvular1830
intervalvular1830
bivalved1852
1823 G. Crabb Technol. Dict. Univalved,..one-valved; an epithet for a pericarp.
1857 A. Gray First Lessons Bot. (1866) 235 Univalved, a pod of only one piece after dehiscence.
uniˈvalvular adj. Botany having or consisting of one valve.
ΘΚΠ
the world > plants > part of plant > reproductive part(s) > seed > seed-vessel or pericarp > [adjective] > having or between divisions or sections
bivalve1737
valved?1768
trivalvular1785
multivalve1793
univalvular1793
univalved1823
bivalvular1830
intervalvular1830
bivalved1852
1793 T. Martyn Lang. Bot. sig. H6 Folliculus,..a follicle..a univalvular pericarp.
1830 J. Lindley Introd. Nat. Syst. Bot. 294 Those species of Panicum whose outer flower is univalvular.
1849 J. H. Balfour Man. Bot. §530 The pericarp becomes divided into different pieces, which are denominated valves, the fruit being univalvular, bivalvular,..&c. according as there are one, two, or many valves.
This entry has not yet been fully updated (first published 1924; most recently modified version published online March 2022).
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adj.n.1661