-ous, -ious, -eous

(Latin: full of or having the qualities of; in chemistry, a suffix denoting that the element indicated by the name bearing it, has a valence lower than that denoted by the termination -ic; as, nitrous, sulphurous, etc., as contrasted with nitric, sulphuric, etc.)

Only a small number of the hundreds of examples are presented because there are just too many to include at this time.

acrogynous (adjective) (not comparative)
In certain plants, a reference to bearing female organs at the apex (tip end) of the stem.
acronychous, achronychous
Having claws, nails, or hoofs.
acrophilous (adjective), more acrophilous, most acrophilous
Pertaining to those who have a strong preference for staying in lofty peaks rather than living in the lowlands.
aculeous
Needle-like, stinging.
adelphous
1. Living in society or in flocks.
2. In botany, a plant in which the stamens, instead of growing singly, combine by the filaments into one or more bundles.
adenogenous
Originating from glandular tissue.
adipsous
Serving to quench thirst; such as, a food or beverage.
adrenogenous
adulterous (adjective), more adulterous, most adulterous
1. Pertaining to not being faithful to one's spouse or partner: Joe's wife had an adulterous relationship with a neighbor named Steve.
2. Characterized by the violation of marriage vows: The adulterous activities of a philandering man or husband.
adventitious (adjective); more adventitious, most adventitious
1. Referring to an addition from without; extrinsically added: The adventitious population in the big city is due to people coming from many different countries from around the world, while the minority of the population was born there.
2. Regarding something that appears sporadically, or out of the normal place: Jane noticed in her garden that some of the flowers she had planted in the fall were evidently quite adventitious and were suddenly appearing in a completely different spot!
3. Not natural or hereditary; pertaining to a growth in an unexpected place on a plant: Examples of such adventitious developments on organisms are roots that form on stems, an increase of hair where it usually is not found, or the development of a plant in a foreign habitat.

Adventitious roots, shoots, buds, etc. are produced in unusual parts of the plant.

aeriferous
Air-conveying; such as, with the respiratory passages.
aerohygrocola (s) (noun), aerohygrocolas (pl): high atmosphere
Those creatures that naturally thrive in high atmospheric humidities.
aerophilous (adjective), more aerophilous, most aerophilous
1. A reference to plants which are pollinated by the wind or fertilized by airborne pollen.
2. Descriptive of plants which can thrive in exposed windy habitats.
agamous (adjective) (not comparative)
Characteristic of not involving the fusion of male and female gametes in reproduction: Agamous male or female cells do not unite with cells of the opposite sex to produce zygotes which are the fertilized eggs that have only just started developing and are not yet embryos which can develop into embryos and then babies.
agaricolous (adjective), more agaricolous, most agaricolous
A reference to species living on mushrooms and toadstools.