词根词缀：centro-, centr-, centri-, kentro-
【来源及含义】Greek > Latin: center; middle point, mid point; focus, focal point, focalize; zero in on
【相关描述】This element originally meant "sharp point, goad" or "spur".
【同源单词】acentric, acentric, acrocentric, allocentric, ambulatory surgery center, amphicentric
词根词缀：geo-, ge-
【来源及含义】Greek: earth, land, soil; world; Gaia (Greek), Gaea (Latin), "earth goddess"
【相关词根词缀】Available for further enlightenment: the Earth, Words from the Myths.
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-;
chthon-;
epeiro-;
glob-;
lut-;
myso-;
pedo-;
pel-;
rhyp-;
soil-;
sord-;
terr-.
【同源单词】ageotropic, ageotropism, agrogeological, agrogeologist, agrogeology, amphigean