pycno- or (before a vowel) pycn-
combining form
indicating thickness or density
⇒
pycnometer
Origin
via New Latin from Greek puknos thickpycno-
Word Origin
1
a combining form meaning “dense,” “close,” “thick,” used in the formation of compound words:
pycnometer.
Also, especially before a vowel, pycn-.
Origin
< New Latin, combining form representing Greek pyknós
Related Words
- pycn-
- pycnometer
- pycnostyle
pycno-a word element meaning 'dense', 'close', 'thick', as in pycnometer.
Also, pykno-; ◆ (before vowels), pycn-. [New Latin, combining form representing Greek pyknos]
1899 Evans Birds inCambr. Nat. Hist. IX. 479The metatarsus scutellated in front, and usually covered with small round scales behind (*pycnaspidean) is especially strong in Pyroderus and Rupicola.
1888 Sollas in ChallengerRep. XXV. p. lxiv,*Pycnaster, a minute aster with short conical strongylate actines. This..might be regarded as a variety of the chiaster.
1903 Mineral. Mag. XIII. 375*Pyknochlorite... A greyish-green, compact chlorite occurring in a quartz and calcite vein in the gabbro of the Radauthal, Harz. It has the same general formula..as clinochlore, but differs from this in containing much more ferrous iron and in its compact (πυκνός) texture.
1960 Amer. Mineralogist XLV. 797The co-existing chlorite occurs in fairly large pale green crystals and shows the typical anomalous interference colors. Its analysis shows it to be fairly rich in Mg and Al, and following the classification of Hey (1954) it may be termed a pycnochlorite, with Fe (total): (Fe + Mg) = 0·273 and Si 2·83, on the basis of 14 oxygens (anhydrous).
1973 Nature 2 Mar. 28/1 Microscopic studies reveal that the metamorphic boundary involves the replacement by quartz and a chlorite mineral of fixed composition (pycnochlorite).
1978 Ibid. 20 July 243/1Chlorites occurring as matrix in greywacke and amygdule fillings and groundmass replacement in spilite are either pycnochlorite or diabantite.
1957 G. E. Hutchinson Treat. Limnol. I. v. 282When a wind blows over a thick layer of water lying over a second layer of greater density, not only will the surface level be raised at the lee end but the *pycnocline, or plane separating the two layers of different density, will be tilted in the opposite direction.
1967 Oceanogr. & MarineBiol. V. 278Changes in the sinking rate..are well substantiated... In pycnoclines a retardation of passive organisms is frequent, sometimes associated with a synthesis of pigments.
1976 Nature 2 Sept. 8/1 Over large areas of the present-day ocean, a permanent density discontinuity (pycnocline) arises as a consequence of the latitudinal variation in the intensity of incident radiation from the Sun.
1836 Buckland Geol. &Min. I. 281The habits of the family of *Pycnodonts appear to have been omnivorous.
1862 Dana Man. Geol. 526The Pycnodont group is now extinct.
1927 Proc. Imper.Acad. Japan III. 610 (title)Notes on some *pycnogons living semi-parasitic on holothurians.
1935 T. H. Savory Arachnida xvi. 172Ever since the first pycnogon was described..the problem of their affinities has been debated.
1959 A. C. Hardy Open Sea II. v. 100Sea-slugs, ascidians, sea-spiders (pycnogons) and spider-crabs, starfish and brittlestars—all these, and more, may be in just one haul.
1877 W. Thomson Voy. Challenger II. 349The *Pycnogonida..attained an enormous size in cold Arctic and Antarctic water.
1881 Times 6 Jan. 4/6 We are promised very shortly similar volumes..on the Pycnogonids or nobody-crabs, on the seaweeds, and on certain groups of worms.
1935 T. H. Savory Arachnida xvi. 172The Pycnogonid crawls about, extremely slowly.
1973 P. E. King Pycnogonids i. 7The pycnogonid body is considerably reduced.
Ibid. 8The pycnogonids have a wide geographical and bathymetric range.
1852 Dana Crust. ii. 1383Of this last class are nearly all the Entomostraca, and with them the *Pycnogonoids.
1884 Knight Dict. Mech. Suppl. ,*Picnohydrometer, a combination of the picnometer and hydrometer... Described in Scientific American, xxxiv. 340.
1858 Thudichum Urine 33The weight of the urine required to fill the *pycnometer is then ascertained.
1881 Nature XXIV. 294 The specific gravity bottle or pyknometer.
1925 Arch. InternalMed. XXXV. 133Specific gravity determinations were made by the *pyknometric method.
1938 Trans. FaradaySoc. XXXIV. 1214 (heading)Pyknometric studies on chemical equilibrium.
1934 Jrnl. Chem. Soc. 498The samples of water obtained by combustion were carefully distilled..and their densities were measured *pyknometrically.
1976 Nature 3 June 438/3 There is a reasonable agreement between X-ray and pycnometrically determined densities in the minerals of the oldest rocks.
1900 Lancet 30 June 1849/2 The cell shows a distinct *pyknomorphic condition.
1899 L. F. Barker NewSyst. Constituent Neurones xi. 123Nissl consequently designates the extremely darkly stained cells as *pyknomorphous cells, or cells in which the stainable portions are arranged relatively most closely.
1903 Med. Chron. XXXIX. 19The stained, chromophile, or tigroid substance of nerve cells is regarded as nutritional substance. When it is abundant the cell is described as being in a pyknomorphous condition.
1887 H. E. F. Garnsey tr. Ade Bary'sCompar. Morphol. &Biol. Fungi v. 246Pycnidia: receptacles..producing gonidia which are known as *pycnospores.
1898 tr. Strasburger'sText-bk. Bot. (1903) 352Conidia..termed pycnospores or pycnoconidia.
1938 G. M. Smith CryptogamicBot. I. xii. 416In addition to forming conidia or pycnospores, a mycelium may also form large thick-walled spores.
pycno-
before vowels pycn-, word-forming element meaning "close, thick, dense," from comb. form of Greek pyknos "thick, dense." Sometimes via German as pykno-.
pycno-
combining form
see pycn-
see pycn-
pycno-pykno-
Prefix
- dense, thick
Etymology
From Ancient Greek πυκνός (puknós, “dense, compact, thick”).