monoclinic

Occasionally monoclinic crystals are obtained by crystallizing from a strong solution.
Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 6|Various
The monoclinic crystals are prismatic in habit, with deeply striated prism and dome faces.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 1 "Franciscans" to "French Language"|Various
All the sodium, sodium-calcium, and calcium species are triclinic, except the rare monoclinic sodium felspar barbierite.
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Crystals of azurite belong to the monoclinic system; they have a vitreous lustre and are translucent.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1|Various

The above may be illustrated by considering the equilibrium between rhombic and monoclinic sulphur.
Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 1|Various

British Dictionary definitions for monoclinic

monoclinic

/ (ˌmɒnəʊˈklɪnɪk) /

adjective

crystallog relating to or belonging to the crystal system characterized by three unequal axes, one pair of which are not at right angles to each other

Word Origin for monoclinic

C19: from mono- + Greek klīnein to lean + -ic

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Scientific definitions for monoclinic

monoclinic

[ mŏn′ə-klĭn′ĭk ]

Relating to a crystal having three axes of different lengths. Two of the axes are at oblique angles to each other, and the third axis is perpendicular to the plane that is made by the other two. The mineral gypsum has monoclinic crystals. See illustration at crystal.