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lūbrĭco, āvi, ātum, 1, v. a. [lubricus], to make smooth or slippery, to lubricate (postclass.). 
- I.  Lit.: qui Lacedaemonium pytismate lubricat orbem, Juv. 11, 175: lubricatus lapis, Arn. 1, 22; Prud. στεφ. 11, 38.
- II.  To be slippery, Vulg. Thren. 4, 18: limo caenoso ripae supercilio lubricante, App. M. 7, 18 (p. 481), 196, 3.
- III.  Trop.: lubricatus, anointed, Prud. Psych. 571.
lūbrĭcus, a, um, adj. [Gr. λιτός, λισσός, smooth; from root γλιτ; cf. γλίσχρος, glittus, and ὀλιβρός, slippery], slippery. 
- I.  Lit.: loculi, Plaut. Mil. 3, 2, 38: testudini injecta imbris in modum lubrico fastigio innoxia ad imum labebantur, Liv. 44, 9, 9: assiduo lubricus imbre lapis, Mart. 4, 18, 2.
 Subst.: lūbrĭcum, i, n., a slippery place, Cels. 8, 3: in lubrico atque instabili fundamenta, Plin. 36, 14, 21, § 95.
 With gen.: equi lubrico paludum lapsantes, on the slippery   morass, Tac. A. 1, 65.
- B.  Transf. 
- 1.  Slippery, smooth, Mart. 9, 58, 3.
- 2.  That easily slips, glides, or moves away, slippery, slimy, lubricous: natura lubricos oculos fecit, Cic. N. D. 2, 57, 142: anguis, Verg. A. 5, 84: exta, Tib. 2, 5, 14: amnis, Ov. Am. 3, 6, 81: pisces, Plin. 9, 20, 37, § 73: conchylia, slimy, Hor. S. 2, 4, 30: corpus, Plin. 2, 3, 3, § 7: lubrica prensantes effugit umbra manus, Ov. F. 5, 476: amnis, gliding, id. Am. 3, 6, 81.
- II.  Trop. 
- A.  Slippery, uncertain, hazardous, dangerous, critical (class.): via vitae praeceps et lubrica, Cic. Fl. 42, 105; cf. id. Rep. 1, 28: viae lubricae adulescentiae, id. Cael. 17, 41: aetas puerilis maxime lubrica atque incerta, id. Verr. 2, 5, 52, § 137: cupiditas dominandi praeceps et lubrica, id. Phil. 5, 18, 50: lubrica defensionis ratio, id. Planc. 2, 5: observatio, Quint. 1, 5, 5: locus, Plin. Ep. 1, 8, 35: geometriam dico  …  et si qua alia propter subtilitatem lubrica sunt, Sen. Ben. 3, 5, 1.
 Poet., with inf.: vultus nimium lubricus aspici, seductive, Hor. C. 1, 19, 8.
 Subst.: lūbrĭcum, i, n., a slippery or hazardous state, period, or season: in lubrico versari, Cic. Or. 28, 98: lubricum aetatis, Plin. Ep. 3, 3, 4: lubricum linguae, Dig. 48, 4, 7, § 3.
- B.  Gliding, fleeting: historia lubrica est hac atque illac fluit, ut homines, qui manibus invicem adprehensis gradum firmant, continent et continentur, passing from one subject to another, Quint. 9, 4, 129: annus, fleeting, Ov. A. A. 3, 364. 
- C.  Slippery, deceitful: nequiquam patrias tentasti lubricus artes, Verg. A. 11, 716.
- D.  Prone, inclined, ready: flore capi juvenum lubrica mentem nympha, Sil. 5, 18: aetas ad vitium, Ambros. de Interp. Job et Dav. 1, 7, 21.
- E.  Unsteady, unsettled, easily going astray: si qua in parte lubricum adulescentiae nostrae declinat, Tac. A. 14, 56: lubricam principis aetatem retinere, id. ib. 13, 2.