epi-, ep-

(Greek: above, over, on, upon; besides; in addition to; toward; among)

anepigraphous
Without an inscription; no inscription.
cotyledon, cotyledonary, cotyledonal
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.
endoepidermal
ephemeral (adjective), more ephemeral, most ephemeral
1. Lasting for only a short period of time and leaving no permanent trace; short-lived; transitory: "Charles was chosen as the top salesperson this morning; however, this ephemeral honor ended because his supervisor realized that Rena had exceeded his sales record."
2. Living or lasting only for a day, as certain plants or insects do: "There are ephemeral organisms that grow, reproduce, and die within a few hours or a day."

"Elisha put flowers from her garden into a vase and they were an ephemeral bouquet because she forgot to put water into the container as a result of being distracted by an unexpected visitor."

3. 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".
Short lived.
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Lasting for just one day.
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epibasal
Upper segment of a zygote or embryo, ultimately giving rise to the shoot.
epibasidium
The part of a heterobasidium which bears sterigmata and is separated by a septum from the hypobasidium.
epibenthic
The community of organisms living at the surface of the sea bed or lake floor.
epibenthos
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.
epibiont
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.

epibiontic
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.

epibiosis
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.
epibiotic
Living attached to another organism; such as, fungus.
epiblast
The outer layer of a gastrula in the embryo of some grasses, a small structure opposite the scutellum, thought to be a rudimentary cotyledon.
epibolic
epicalyx

Related "above, over, beyond the normal, excessive" word units: hyper-; super-, supra-, sur; ultra-, ult-.