chthon- +

(Greek: earth, of the earth, soil, dirt)

chthonal
1. Descriptive term referring to the underworld.
2. Dwelling in or beneath the surface of the earth.
chthonian
1. Referring to, or pertaining to, the deities, spirits, and other beings dwelling under the earth.
2. Relating to the underworld.
3. Dwelling in, or beneath, the surface of the earth.
chthonic
1. Referring to the underworld.
2. Relating to the underworld as described in Greek mythology.
3. Dwelling in or beneath the surface of the earth.
4. Etymology: from Greek khthonios, "in the earth"; from khthon, "the earth, solid surface of the earth" (mostly poetic).
chthonism
1. Being in, or beneath, the earth.
2. Dwelling in, or beneath, the surface of the earth.
chthonograph
A history or written description of soils.
chthonography
The written history, or description, of soils.
chthononosology
The geography of diseases.
chthonophagia, chthonophagy
Eating earth; rarely used terms for geophagia, geophagy.
chthonous
1. Referring to the earth; of the earth.
2. Characterized by soil, or dirt.
heterochthonous
Something, or someone, originating in a geographical area other than that in which it is found.
nosochthonography
The science concerned with the influence of climatic and environmental conditions on health and disease; also known as, geomedicine.
parautochthonous
Intermediate in character between autochthonous (native to the soil, aboriginal, indigenous) and allochthonous (organic deposits and rock formations).
pelagochthonous
A reference to coal derived from a submerged forest or from driftwood.

Cross references of word families related directly, or indirectly, to: "land, ground, fields, soil, dirt, mud, clay, earth (world)": agra-; agrest-; agri-; agro-; argill-; choro-; epeiro-; geo-; glob-; lut-; myso-; pedo-; pel-; rhyp-; soil-; sord-; terr-.