preterminal
Located slightly before the end or tip of something.
Results for “pre-”
Ichthyological terms, not general ones.
Hydra
Genus of freshwater cnidarian existing only in sessile, solitary polyp form attached to the substrate at one end and with a mouth surrounded by up to 12 tentacles at the other. Members are predatory, feeding mostly on small invertebrates, and regarded as pests in aquaria due to their appearance as whitish spots on submerged surfaces and tendency to prey on fish fry.
Used in 1 profile
kleptoparasitism
Feeding behaviour in which one organism robs food from another that has previously caught, collected or otherwise prepared it.
new combination
In zoological nomenclature, the first combination of a generic and previously-published specific name.
ocellus
Element of colour pattern resembling an eye; an eyespot or 'false' eye, often present in order to disorient predators.
Used in 39 profiles
osmoregulation
Active regulation of osmotic pressure, especially in the body of a living organism or cell, in order to prevent the body fluids from becoming too diluted or concentrated.
cultivate
To prepare or prepare and use to grow plants; to improve the growth of.
derived trait
In phylogenetics, a trait present in an organism which was absent in the last common ancestor of the group being considered; an apomorphy. Also used to refer to traits present in the ancestral form that have subsequently been lost.
abiotic
Non-living. Abiotic factors in an environment include such items as sunlight, temperature, wind patterns, and precipitation, for example.
adaptive radiation
Speciation of a taxonomic group into several forms, each specialised to fill a previously vacant ecological niche, as exemplified by Rift Lake cichlids, for example.
Used in 60 profiles
adipose eyelid
Transparent eyelid present in some fishes, that covers some or all of the eye.
adipose-fin
A small, fleshy, rayless fin present in certain fishes and located behind the dorsal fin.
Used in 100 profiles
aerobic
Living or occurring only in the presence of oxygen.
alimentary canal
The passage (including the oesophagus, stomach, and intestines when present) along which food passes through the body from mouth to anus.
andropodium
Modified, flexible anal fin rays present in males of some fish species (families Hemirhamphidae and Goodeidae) giving the fin a 'notched' appearance. Not used for insemination like the gonopodium in members of the family Poecillidae but to clasp the female during mating.
Used in 5 profiles
apomorph
An organism existing in an evolutionary state that represents a morphological advance compared to a previous state. Occurs at an evolutionary branching point and is subsequently carried through only a single descendant group.
artesian
Involving, relating to, or supplied by the upward movement of water under hydrostatic pressure in rocks or unconsolidated material beneath the earth's surface.
Used in 1 profile
artesian basin
Type of confined aquifer containing groundwater under positive pressure.
artesian well
A well, normally deep-drilled through impermeable material through which water is then rises via natural hydrostatic pressure.
Used in 1 profile
ascending process
A vertical process on the anterior part of the premaxillary bone in most teleosts.
Used in 4 profiles