Orthic

Part of speech: adjective

Definitions

1. Pertaining to or characteristic of a soil horizon composed primarily of organic matter mixed with mineral content, typically forming the upper layer in soil profiles; referring to features or processes associated with such a soil horizon
2. Relating to or describing the soil layer rich in decomposed organic material blended with mineral particles, often found at the surface of soil sections; associated with soil science and stratification
3. Connected to the upper soil horizon where organic debris integrates with mineral substances, influencing soil composition and fertility; denoting aspects of this particular soil stratum in environmental contexts

Etymology: Ancient Greek "orthos" meant "straight," "upright," or "correct," and it gave English a family of words for things set right or true, such as "orthodox" (right opinion) and "orthography" (correct writing). The adjective draws on the same root, in the sense of "true" or "typical." In soil science, an orthic form is the standard, unmodified version of a soil type, showing its basic features without the special additions that mark its variants. The dark surface layer of decomposed plant matter mixed with mineral grains is the part the term describes.

Synonyms: orthogonal, right-angled

Antonyms: oblique, skewed