geo-, ge- +

1. The response of a plant to gravity, as evidenced by growing patterns; such as, downward root growth and growth curvature.
2. Plant growth or movement in response to gravity.

Primary roots (tap roots) grow vertically towards gravity (positive geotropism) whereas primary shoots grow vertically away from gravity (negative geotropism), though the direction of shoot growth may also be modified by light.

1. An organism that becomes a temporary member of the soil fauna.
2. An organism found in a soil stratum of which it is not normally a resident.

A situation where an organism becomes a temporary or an accidental member of soil fauna; temporary includion in soil fauna.

A plant having woody stems arising from an underground woody rhizone.

1. Someone who studies geological phenomena involving the action of ice; especially, of glaciers.
2. Anyone who attributes the phenomena of the drift, in geology, to glaciers.

1. The science dealing with the occurrence and distribution of underground water. Also called hydrology and geohydrology.
2. The branch of geology that deals with the occurrence, distribution, and effect of ground water.
3. That branch of geology that studies the movement of subsurface water through rocks and the effect of moving water on rocks, including their erosion.

A plant that grows in earth and water.

A plant that lives primarily beneath the surface of the ground, or that germinates with the cotyledons remaining in the soil; such as the peanut or oak.

1. Formed by ascending fluids within the earth; such as, ore or mineral deposits.
2. Formed beneath the earth's surface.

1. Happening or living below ground.
2. Living or germinating below the soil surface.

A line or surface (usually imaginary) connecting points in the interior of the earth having the same temperature; an isogeothermal line.

A descriptive reference to a line or surface (usually imaginary) connecting points in the interior of the earth having the same temperature; an isogeothermal line.

Large-scale, usually highly theoretical, geographical study.

A zoogeographical area consisting of the Palaearctic, Nearctic, Ethopian, and Oriental Regions.

An organism that thrives in or on black loam.