epi-, ep-

Without an inscription; no inscription.

1. The first leaf or leaves in the embryo of flowering plants and other seed plants.
2. One of the first leaves to appear after germination (there may be one, two, or more); the foliar portion of the embryo as found in the seed.

1. Lasting for only a short period of time and leaving no permanent trace; short-lived; transitory.
2. Living or lasting only for a day, as certain plants or insects do; such as, an organism that grows, reproduces, and dies within a few hours or days; or a flower that lasts for a day or less.
3. Beginning and ending in a day.
4. Etymology: Ephemeral, now used fairly loosely for "transitory", originally meant specifically "lasting only one day". It comes from Greek ephemeros, a compound word formed from the prefix epi-, "on" and hemera, "day".

Upper segment of a zygote or embryo, ultimately giving rise to the shoot.

The part of a heterobasidium which bears sterigmata and is separated by a septum from the hypobasidium.

The community of organisms living at the surface of the sea bed or lake floor.

1. The community of organisms living at the surface of the sea bed or lake floor.
2. Fauna and flora of sea-bottom between low-water mark and hundred-fathom line or the 200-meter line.

1. Living attached to another organism.
2. Surviving, applied to endemic species that are relics of a former flora or fauna; growing on the exterior of living organisms; living on a surface, as of the sea bottom.

An antonym is hypobiotic.

Living attached to another organism without any connotation of mutualism.

Urchins and grazing fishes feed on epibionts of reefs and often scrape off bits of calcium carbonate; resulting in bioerosion.

Either the condition of those organisms that live on the surface of another organism or those benthic organisms that live on the surface of bottom mud.

Living attached to another organism; such as, fungus.

The outer layer of a gastrula in the embryo of some grasses, a small structure opposite the scutellum, thought to be a rudimentary cotyledon.