Terracotta

Terracotta, sometimes spelled terra cortta, is a red clay-based baked ceramic, usually unglazed.^{[1][2][3][4][5]}

Its uses include vessels, water and waste water pipes and surface embellishment in building construction, along with sculpture such as the Terracotta Army and Greek terracotta figurines. The term is also used to refer to items made out of this material and to its natural, brownish orange color, which varies considerably.

1. ↑ Merriam-Webster.com
2. ↑ ‘Diagnosis Of Terra-Cotta Glaze Spalling.’ S.E. Thomasen, C.L. Searls. Masonry: Materials, Design, Construction and Maintenance. ASTM STP 992 Philadelphia, USA, 1988. American Society for Testing & Materials.
3. ↑ ‘Colour Degradation In A Terra Cotta Glaze’ H.J. Lee, W.M. Carty, J.Gill. Ceram.Eng.Sci.Proc. 21, No.2, 2000, p.45-58.
4. ↑ ‘High-lead glaze compositions and alterations: example of Byzantine tiles.’ A. Bouquillon. C. Pouthas. Euro Ceramics V. Pt.2. Trans Tech Publications, Switzerland,1997, p.1487-1490 Quote: “A collection of architectural Byzantine tiles in glazed terra cotta is stored and exhibited in the Art Object department of the Louvre Museum as well as in the Musee de la Ceramique de Sèvres.”
5. ↑ 'Industrial Ceramics.' F.Singer, S.S.Singer. Chapman & Hall. 1971. Quote: "The lighter pieces that are glazed may also be termed 'terracotta.'