boccan.
/ˈbɒkə//ˈbəʊkə/ 1. A circular opening in a glass-furnace, through which the melting-pots are inserted and withdrawn.
ΘΚΠ
society > occupation and work > equipment > furnace or kiln > furnace > [noun] > glass-making furnaces > openings
working hole1735
bocca1799
boccarella1799
tunnel1839
1799 tr. Laboratory (ed. 6) I. iv. 167 The mouth [of a glass furnace] is called the bocca.
1832 G. R. Porter Treat. Manuf. Porcelain & Glass 159 The openings..serving for the introduction of the materials and for the removal of the melted glass, are called boccas.
2. (See quot. 1881.)
ΘΚΠ
the world > the earth > structure of the earth > structural features > volcanic formations > [noun] > volcanic vent
chimneyc1374
vent1604
firepit1651
spiraculum1670
spiracle1671
solfatara1764
sulphur1764
volcanic crater1776
fumarole1811
air volcano1814
mud volcano1816
salse1831
blowhole1858
pipe1877
soufrière1879
bocca1881
mofette1887
pan1888
blowing-cone1895
smoke-hole1899
fault-vent1903
1881 Pop. Sci. Monthly May 51 The active bocca or mouth of Vesuvius.
This entry has not yet been fully updated (first published 1887; most recently modified version published online March 2018).
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