Etymology From Ancient Greek δίσκος (dískos, “a circular plate suited for hurling”), from δικέω (dikéō, “to hurl, to launch”). Doublet of dais, desk, disc, discus, dish, and diskos.
Biology, Botany, Natural sciences A ring- or cup-shaped enlargement of the flower receptacle or ovary that bears nectar or, less commonly, the stamens.
Etymology From Ancient Greek δίσκος (dískos, “a circular plate suited for hurling”), from δικέω (dikéō, “to hurl, to launch”). Doublet of dais, desk, disc, discus, dish, and diskos.
That is alkali. Mr. Kochendorfer: I have a ten-year apple orchard that I disked last year and kept it tolerably clean this spring.1916, Various, Trees, Fruits and Flowers of Minnesota, 1916:
The next year I plowed and disked the patch of ground and planted potatoes.1948, Various, Northern Nut Growers Association Incorporated 39th Annual Report:
1 more example
The soil is plowed and disked and then seeded with a mixture of prairie plants.1991 September 6, Jerry Sullivan, “Field & Street”, in Chicago Reader:
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Aeronautics, Aerospace, Aviation, Business, Engineering, Natural sciences, Physical sciencesOf an aircraft's propeller To move towards, or operate at, zero blade pitch, orienting the propeller blades face-on to the oncoming airstream and maximizing the drag generated by the propeller.