- (mineralogy) A crude form of sodium nitrate from South America; used as a fertilizer.
- A layer of hard clay subsoil or sedimentary rock; hardpan.
- According to local well drillers, in wells drilled on the high plains a few hundred feet back from the caliche escarpment or in other locations on the high plains in this area no hard caliche or white layer, such as would characterize a soft layer of high lime-carbonate content, is generally reached at a depth corresponding to the elevation of the caliche escarpment.
- Having a layer of caliche at depths of 16 inches and less really puts a damper on the garden site. The caliche does not allow roots to penetrate it nor does this mineral allow water to drain.
- Caliche in various forms, namely powdery, nodule, tube, fracture-infill, laminar crust, hard laminated crust and pisolitic crust, is widespread in the Mersin area in southern Turkey .
- A mineral substance made up of small crystals of silica and alumina, that is ductile when moist; the material of pre-fired ceramics.
- An earth material with ductile qualities.
- (tennis) A tennis court surface made of crushed stone, brick, shale, or other unbound mineral aggregate.
- (biblical) The material of the human body.
- (geology) A particle less than 3.9 microns in diameter, following the Wentworth scale.
- A clay pipe for smoking tobacco.
- (firearms, informal) A clay pigeon.
- (informal) Land or territory of a country or other political region, especially when subject to territorial claims
- (material of the human body): soul, spirit
- kaolin, kaoline
- ball clay
- fire clay
- potter’s clay
- Three chairs of the steamer type, all maimed, comprised the furniture of this roof-garden, with on one of the copings a row of four red clay flower-pots filled with sun-baked dust […].
- The French Open is played on clay.
- Thine hands have made me and fashioned me together round about…thou hast made me as the clay.
- But now, O Lord, thou art our Father; we are the clay, and thou art our potter; and we are the work of thy hand.
- We went shooting clays at the weekend.
- Danzig is rightfully German clay.
- (transitive) To add clay to, to spread clay onto.
- (transitive, of sugar) To purify using clay.
- They amounted, therefore, to a prohibition, at first of claying or refining sugar for any foreign market, and at present of claying or refining it for the market, which takes off, perhaps, more than nine-tenths of the whole produce.
- The Portuguese had mastered the technique of claying sugar, and other European nations tried to learn the secrets from them.