▪ I. filtrate, n.
(ˈfɪltreɪt)
[ad. mod.L. filtrātum, f. filtrāre: cf. filter v. and -ate1.]
a. The liquor which has been passed through a filter.
| 1845–6 G. E. Day tr. Simon's Anim. Chem. II. 125 The lead contained in solution in the filtrate was separated. 1875 Darwin Insectiv. Pl. vi. 89 The filtrate contained as much of the fibrin as had been digested. |
b. attrib., as filtrate factor, any soluble unidentified substance in a filtrate, esp. such a substance affecting the growth of an organism.
| 1937 Edgar & Macrae in Biochem. Jrnl. XXXI. 893 The second constituent was present in the filtrate after fuller's earth treatment of the yeast extract; this we have called the yeast fuller's earth filtrate factor. 1965 Mycologia LVII. 273 For M[orchella] crassipes the beneficial effect is accounted for mainly..by the minerals supplied by the natural product, especially Mn and Ca. These two elements make up the ‘filtrate factor’ previously reported for this fungus. |
▪ II. filtrate, v.
(ˈfɪltreɪt)
Also 7 filterate.
[ad. mod.L. filtrāt- ppl. stem of filtrāre to filter.]
1. trans. = filter v. 1.
| 1612 Woodall Surg. Mate Wks. (1653) 245 Calcine them, and after inbibe and filtrate them, etc. 1764 Harmer Observ. xxvii. iv. 192 They filtrate it [the wine of Schiras] through a cloth, and then it is very clear. 1852 Th. Ross Humboldt's Trav. II. xxiv. 439 Leaves of the plantain..used to filtrate the liquids. c 1865 Ld. Brougham in Circ. Sc. I. Introd. Disc. 23 The process of vegetation filtrates or distils the liquid, so as to produce from the worst, the purest water. |
| fig. 1776 Johnson in Boswell Life II. 408 He never clarified his notions, by filtrating them through other minds. 1885 H. N. Oxenham Short Studies 331 A Christianity filtrated of all its sectarian dogmas. |
2. To cause to percolate; = filter v. 2.
| 1661 Boyle Spring of Air ii. Index, A vessel by which Air may be filtrated thorough water. 1794 Sullivan View Nat. I. 68 The waters, filtrated through these bodies. |
3. intr. = filter v. 3.
| 1725 Bradley Fam. Dict. s.v. Milk, A white Liquor which filtrates thro' the Glands of Women's Breasts. 1780 Schotte in Phil. Trans. LXX. 480 Digging a pit into the sand..into which the water filtrates from all sides. 1834 Pringle Afr. Sk. v. 210 Through which the stream..filtrates silently and unperceived. |
| fig. 1876 Tinsley's Mag. XVIII. 43 The corruptions of the higher stratum of society had been slowly filtrating to the lower. |
Hence ˈfiltrated ppl. a., ˈfiltrating vbl. n. in quots. attrib.
| 1665 Hooke Microgr. 128 The filterated Oyl. 1730 Stuart in Phil. Trans. XXXVI. 356 A small Quantity of filtrated Bile. 1772 Monro ibid. LXII. 30 The water being taken up by the spungy filtrating paper. 1811 J. Ashley Patent No. 3472 The water..ascends through the filtrating medium. 1836 Macgillivray tr. Humboldt's Trav. xxiv. 350 The filtrated water losing itself in the crevices. |