| 释义 |
tridentate, a.|traɪˈdɛntət|
[f. tri- + L. dentāt-us toothed: see -ate2 2.]
1. Bot. and Zool. Having three teeth or tooth-like processes; three-pronged, three-pointed.
1760J. Lee Introd. Bot. ii. xxii. (1765) 124 Corolla..either..tridentate; or quinquedentate. 1852Dana Crust. i. 662 The only species..have the front of the carapax deeply tridentate. 1856–8W. Clark Van der Hoeven's Zool. I. 313 Tarsi with tridentate claws.
2. Chem. Of a ligand: forming three separate bonds (usu. but not necessarily with the same central atom). Of a molecule or complex: formed by such a ligand.
1925Jrnl. Chem. Soc. CXXVII. 2030 Werner also identified groups capable of treble attachment to metallic atoms, such tridentate residues containing three fused chelate groups. 1966Phillips & Williams Inorg. Chem. II. xxvii. 347 The cyclopentadienyl and benzene ligands are best regarded as tridentate and their transition-metal complexes are strongly stabilized in the sandwich symmetry only.
So † triˈdentated a. Obs. = sense 1 above.
1752J. Hill Hist. Anim. 35 The grey Fly..with tridentated marks on the abdomen. 1822J. Parkinson Outl. Oryctol. 275 Numerous teeth of cartilaginous fishes..triangular,..tricuspidated, tridentated. |
