lambdoidaladj.
/lamˈdɔɪdəl/ Resembling the Greek letter lambda (Λ) in form.
1. Anatomy. lambdoidal suture (†commissure), the suture connecting the two parietal bones with the occipital. Also lambdoidal ridge (see quot. 1888).
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the world > life > the body > structural parts > joint > joints > [noun] > joints of skull
commissure?a1425
lambdac1475
sagittal suture (addition, commissure)?1541
coronal suture1543
sagit?1550
garland-seam1576
commissary1577
agglutination1578
skull-seam1605
lambdoidal suture (commissure)1653
transverse suture1741
orbitar1782
pterion1878
1653 T. Urquhart tr. F. Rabelais 1st Bk. Wks. xxvii. 127 If any thought by flight to escape, he made his head to flie in pieces by the Lambdoidal commissure, which is a seame in the hinder part of the scull.
1698 E. Tyson in Philos. Trans. (Royal Soc.) 20 148 The Lambdoidal Suture.
1741 A. Monro Anat. Human Bones (ed. 3) 70 The Lambdoidal Suture, begins some way below, and farther back than the Vertex or Crown of the Head, whence its two Legs are stretched obliquely down and to each Side, in Form of the Greek Letter Λ.
1866 T. H. Huxley in S. Laing Pre-hist. Remains Caithness 86 The coronal suture is traceable throughout; the sagittal and the middle part of the lambdoidal are almost completely obliterated.
1888 New Sydenham Soc. Lexicon Lambdoidal ridge, the edge of the occipital bone forming the lambdoid suture, which in some animals, as the cat, forms a salient ridge for the attachment of muscles.
2. Resembling the shape of the small Greek letter lambda λ.Apparently an isolated use.
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1818 J. Brown Psyche 189 Bid her forbear when males are by, To stand like an inverted Y. Since modesty and sense avoid all Postures and attitudes lamdoidal.
This entry has not yet been fully updated (first published 1901; most recently modified version published online March 2022).
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adj.1653