| 单词 | calcar | 
| 释义 | calcarn.1 1.  In Glass-making: ‘A small furnace, in which the first calcination is made of sand and potash, for the formation of a frit’ (Ure s.v.). ΘΚΠ society > occupation and work > equipment > furnace or kiln > furnace > 			[noun]		 > glass-making furnaces glass-furnace1632 calcar1662 leer1662 pot furnace1839 blowing-furnace1875 tank furnace1879 1662    C. Merrett tr.  A. Neri Art of Glass 19  				Mix & spread them well in the Calcar, with a rake, that they may be well calcined, & continue this till they begin to grow into lumps. 1712    J. Browne tr.  P. Pomet et al.  Compl. Hist. Druggs I. 104  				The English call the whole Quantity, bak'd at a time in the Calcar, a Batch. 1832    G. R. Porter Porcelain & Glass in  Lardner's Cab. Cycl. 155  				The Calcar is in the form of an oven about ten feet long, seven feet wide, and two feet high. 1875    R. Hunt  & F. W. Rudler Ure's Dict. Arts 		(ed. 7)	 II. 654  				A reverberatory furnace or calcar. Categories »  2.  Metallurgy. An annealing arch or oven. This entry has not yet been fully updated (first published 1888; most recently modified version published online June 2021). calcarn.2 Botany.  1.  A hollow ‘spur’ from the base of a petal. ΘΚΠ the world > plants > part of plant > reproductive part(s) > flower or part containing reproductive organs > 			[noun]		 > parts of > petal > calcar, spur, or claw heel1597 onglet1725 spur1731 claw1791 calcar1832 1832    J. Lindley Introd. Bot.  i. 120  				Sometimes a petal is lengthened at the base into a hollow tube, as in Orchis, &c.: this is called the spur or calcar, and by some nectarotheca. 1836    Penny Cycl. VI. 138/2  				Calcar, or spur in flowers, is a hollow projection from the base of a petal, and has usually a conical figure. 1880    A. Gray Bot. Text-bk. 		(ed. 6)	 400  				Calcar, a spur; mostly used for the nectariferous one of a calyx or corolla.  2.  Anatomy. Any of various spur-like bones of vertebrates, or the tibial spur of some insects. ΘΚΠ the world > animals > animal body > general parts > constituent materials > 			[noun]		 > spur-like bone calcar1895 the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > 			[noun]		 > leg(s) > fourth joint or tibia > tibia or spur calcar1895 1895    Cambr. Nat. Hist. V. iii. 104  				The spines at the top of the tibia [of insects], projecting beyond it, are called spurs, or calcares. 1898    T. J. Parker  & W. A. Haswell Text-bk. Zool. II. 254  				On the tibial side of the first [digit] is a spur-like structure or calcar..: such a rudimentary digit is called a præhallux. 1951    C. K. Weichert Anat. Chordates x. 484  				A small additional bone, the prehallux, or calcar, occurs on the tibial side of the tarsus in most salientians. This entry has not yet been fully updated (first published 1888; most recently modified version published online June 2018). < | 
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