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A computer is a machine that can be programmed to automatically carry out sequences of arithmetic or logical operations (computation). Modern digital electronic...

The 12-hour clock is a time convention in which the 24 hours of the day are divided into two periods: a.m. (from Latin ante meridiem, translating to "before...

A sense is a biological system used by an organism for sensation, the process of gathering information about the surroundings through the detection of...

Citroën (French pronunciation: [sitʁɔɛn] ) is a French automobile brand. The "Automobiles Citroën" manufacturing company was founded in 4 June 1919 by...

Internet pornography is any pornography that is accessible over the Internet; primarily via websites, FTP connections, peer-to-peer file sharing, or Usenet...

A calendar era is the period of time elapsed since one epoch of a calendar and, if it exists, before the next one. For example, it is the year 2024 as...

Chloral hydrate is a geminal diol with the formula Cl3C−CH(OH)2. It was first used as a sedative and hypnotic in Germany in the 1870s. Over time it was...

Anthracite, also known as hard coal and black coal, is a hard, compact variety of coal that has a submetallic lustre. It has the highest carbon content...

Lossless compression is a class of data compression that allows the original data to be perfectly reconstructed from the compressed data with no loss of...

Glycoproteins are proteins which contain oligosaccharide chains covalently attached to amino acid side-chains. The carbohydrate is attached to the protein...

The ounce (/ˈaʊns/) is any of several different units of mass, weight, or volume and is derived almost unchanged from the uncia, an Ancient Roman unit...

Telex is a telecommunication service that provides text-based message exchange over the circuits of the public switched telephone network or by private...

Lantana (/lænˈtɑːnə, -ˈteɪ-/) is a genus of about 150 species of perennial flowering plants in the verbena family, Verbenaceae. They are native to tropical...

Computer Science and Artificial Intelligence Laboratory (CSAIL) is a research institute at the Massachusetts Institute of Technology (MIT) formed by the...

Look up horn in Wiktionary, the free dictionary. A horn is a permanent pointed projection on the head of various animals that consists of a covering of...

Tularemia, also known as rabbit fever, is an infectious disease caused by the bacterium Francisella tularensis. Symptoms may include fever, skin ulcers...

A shoe size is an indication of the fitting size of a shoe for a person. There are a number of different shoe-size systems used worldwide. While all shoe...

An automated external defibrillator or automatic electronic defibrillator (AED) is a portable electronic device that automatically diagnoses the life-threatening...

Tropical diseases are diseases that are prevalent in or unique to tropical and subtropical regions. The diseases are less prevalent in temperate climates...

Ewen Adair Whitaker (22 June 1922 – 11 October 2016) was a British-born astronomer who specialized in lunar studies. During World War II he was engaged...