gill

(redirected from gills)
Also found in: Dictionary, Thesaurus, Legal, Financial, Idioms, Encyclopedia, Wikipedia.

gill

(gĭl)
n.
Zoology The respiratory organ of most aquatic animals that obtain oxygen from water, consisting of a filamentous structure of vascular membranes across which dissolved gases are exchanged.

gilled adj.

gill

  1. the respiratory organ of aquatic animals. External gills, as in tadpoles, are produced by the embryonic ECTODERM; internal gills, as in fish, are developed from the pharynx and are thus endodermal (see ENDODERM). Gills are usually well supplied with blood vessels, and interchange of oxygen and carbon dioxide takes place across the extensive surface area (see COUNTERCURRENT EXCHANGE). Gills also occur in many invertebrates, for example, in insects such as the caddis fly larva and molluscs such as oysters. Occasionally, unusual structures act as gills, for example, the walls of the rectum in certain dragonfly nymphs, water being pumped in and out via the anus.
  2. the spore-carrying lamellae in basidiomycete fungi, located underneath the cap or ‘pileus’.
References in periodicals archive ?
On four separate occasions over the course of four days in March 2016, Gill was ordered out-of-service by state roadside safety inspectors for falsifying records of duty status and egregiously violating hours of service limitations designed to prevent fatigued driving.
The model Gills has invested in was only launched this year and has the added benefit of a triple oil filtration system.
The presence of gill lice on salmonids in Colorado represents an important challenge in management and potential threat to economically and ecologically important salmonid populations.
Previous studies analyzed gill rakers and their adaptations related to feeding in species with the same feeding habit (LANGELAND & NOST, 1995; EIRAS-STOFELLA & CHARVET-ALMEIDA, 1997) or related gill rakers to species identification (LUCENA et al., 1992).
They pointed out that the red substance does not fade easily or come off when they touch the gills with their fingers to check the freshness of the fish so they do not doubt it to be any artificial substance.
Gill and wife Leila, 35, ran an alternative medical centre from their bungalow where they abused two women.
Wheelchair-bound Gill was aided by a wife more than 40 years younger who helped him dupe two female victims.
But two of the world's biggest cruise companies, Carnival and Royal Caribbean, yesterday announced they were no longer accepting bookings from Gill's.
The team discovered as the larvae matured, their gills developed the ability to regulate the chemicals in their blood earlier than they began to take up oxygen.
edulis gills (compared to the relative absence of such cilia in most other bivalve gills) has been debated in recent years.
Anthony Gill, of Worcester Road, operated as the head of the gang and was involved in sourcing drugs, predominantly cocaine, from his criminal contacts.