-arium (s), -aria (pl)

1. A water-filled transparent container, often box-shaped, in which fish and other aquatic or water animals and plants are kept: "The teacher had an aquarium in the classroom for the students to observe and learn about a variety of fresh water flora and fauna."

"As a child, Adam was given an aquarium which contained several fish to keep as a hobby."

2. A building in which fish and other water animals are kept and shown to the public: "There were several aquaria in the natural history museum for both fresh and salt water fish."

"During the summer, many tourists visit the outdoor aquaria near the seashore."

An aquarium is also known as a vivarium, and is usually contained in a clear-sided container (typically constructed of glass or high-strength plastic) in which water-dwelling plants and animals (usually fish, and sometimes invertebrates, as well as amphibians, marine mammals, and reptiles) are kept in captivity, often for public display; or it is an establishment featuring such displays.

A wide variety of aquaria are now kept by hobbyists, ranging from a simple bowl housing a single fish to complex ecosystems with carefully engineered support systems. Aquaria are usually classified as containing fresh or salt water, at tropical or cold water temperatures.

The complete assemblage of equipment necessary for a task: "The medical students visited the medical museum and saw the armamentarium used by doctors from a previous century."

A special room for growing aspidistra or evergreen perennial plants with large basal leaves that are grown primarily as a foliage houseplant: "The couple had a special aspidarium in their house where they grew a variety aspidistra."

1. In a Roman bath, a sauna room heated by the hypocausta, the under floor heating system: "The calidarium was a room for the patron to use olive oil to cleanse themselves by applying it all over their bodies and using a strigil, or rough edged tool, to remove the excess oil."
2. In Roman baths, the hottest room, with a plunge-pool which was used before the tepidarium, a moderately warm room, and the frigidarium, a chilled room with a cold bath: "Taking a Roman Bath involved the ritual of moving from a frigidarium through the tepidarium and on to the calidarium and going through the same bathing rooms in reverse after the bath."

A niche for a funeral urn containing the ashes of the cremated dead: "The funeral parlor had several cineraria in which to display the various styles of urns for the ashes of those who had been cremated."

A depression of each of the higher sides of the body at the upper end of the sternum (long flat bone in the upper middle of the front of the chest) that comes together with the cartilages of the first seven ribs and with the clavicle (collarbone) on each side: "In a romantic gesture, the husband traced the clavicular notch of his beloved with his finger."

1. Also known as a columbary, a vault with niches for urns containing ashes of the dead: "At the funeral, the eldest child placed the urn of the ashes of the parent in the columbarium at the town’s cemetery."
2. A dovecote, or a pigeonhole in a dovecote (or dovecot), is a roost for domesticated pigeons: "There was an artistically designed columbarium for the pigeons in the corner of the farm yard."
3. Etymology: from Latin, columba, dove (pigeon); then it came to mean "a sepurchre for urns" and a "dovecote"."

Ants' nest, particularly an artificial arrangement for purposes of scientific study: "The teacher used a discarded aquarium to build a formicarium so her students could study the behavior of ants."

A pool used in the Roman baths that had cool water for a refreshing rinse after going through the hotter baths: "The local health spa recently built a frigidarium to compliment their sauna services."

A place for smoking; a smoke chamber: "Recently there was a Public Health law enacted that restaurants had to build a fumarium to protect non-smokers and to accommodate their customers who wanted to smoke."

An institution or building or a book for the preservation of plant specimens: "The university build a temperature controlled herbarium in which to store the preserved specimens of exotic plants collected from around the world. The famous explorer who had been a student at the university contributed her herbaria."

A place with a large expanse of glass windows where special therapeutic treatment is provided for horses by means of exposure to sunlight: "At intervals during the performing season, the show horses were taken to the hippolarium for a sun bath."

Gratuity or financial gift: "After her speech, the guest lecturer was awarded an honorarium in addition to her travel expenses."

"Honoraria are payments or fees presented for professional services on which no fixed prices were set."

"The term honorarium is a short form of honorarium donum, 'a present made on being admitted to an honor'."

A place for keeping a collection of living insects and for breeding them for scientific studies: "The local zoo had a special insectarium for visitors to visit."

The sweating-room or vapor bath, so called from having been first used by the Laconians or Spartans: "The laconicum was heated by artificially warmed air for sweating when taking the Roman baths."