orthidとは 意味・読み方・使い方

名詞

orthid (plural orthids)

1. (zoology) A brachiopod shell of the genus †Orthis (or allied genera) in the family †Orthidae.
2. (soil science) A mineral soil with ochric epipedon that does not have an argillic or natric horizon.
   • 1977, Soil Survey Horizons - Volumes 18-19, page 23:

     —orthid, great group with a horizon with an accumulation of salts more soluble than gypsum.

   • 1977, Russell Moore, Thomas Mills, An environmental guide to western surface mining - Parts 1-2, page 13:

     Orthid soils are used for grazing or are irrigated for crop production if water is available.

   • 2012, H. Barth, P. L'Hermite, Scientific Basis for Soil Protection in the European Community, page 79:

     When drained, they are comparable in sensitivity to orthid luvisols in an A horizon with a very low clay content.