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Related to Catha: khat, Catha edulis, Cathar, Cathay


chat, name applied to several Old World perching birds, such as the wheatear (see thrush), the whinchat, and the stonechat, and to a common American warbler.
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A stony mineral material, occurring with mineral ore; very similar to chert.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.


1. any Old World songbird of the subfamily Turdinae (thrushes, etc.) having a harsh chattering cry
2. any of various North American warblers, such as Icteria virens (yellow-breasted chat)
3. any of various Australian wrens (family Muscicapidae) of the genus Ephthianura and other genera


Archaic or dialect a catkin, esp a willow catkin
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005


(chat, messaging)
Any system that allows any number of logged-in users to have a typed, real-time, on-line conversation via a network.

The medium of chat is descended from talk, but the terms (and the media) have been distinct since at least the early 1990s. talk is prototypically for a small number of people, generally with no provision for channels. In chat systems, however, there are many channels in which any number of people can talk; and users may send private (one-to-one) messages.

Some early chat systems (in use 1998) include IRC, ICQ and Palace. More recent alternatives include MSN Messenger and Google Talk.

Chat systems have given rise to a distinctive style combining the immediacy of talking with all the precision (and verbosity) that written language entails. It is difficult to communicate inflection, though conventions have arisen to help with this.

The conventions of chat systems include special items of jargon, generally abbreviations meant to save typing, which are not used orally. E.g. BCNU, BBL, BTW, CUL, FWIW, FYA, FYI, IMHO, OT, OTT, TNX, WRT, WTF, WTH, <g>, <gr&d>, BBL, HHOK, NHOH, ROTFL, AFK, b4, TTFN, TTYL, OIC, re.

Much of the chat style is identical to (and probably derived from) Morse code jargon used by ham-radio amateurs since the 1920s, and there is, not surprisingly, some overlap with TDD jargon. Most of the jargon was in use in talk systems. Many of these expressions are also common in Usenet news and electronic mail and some have seeped into popular culture, as with emoticons.

The MUD community uses a mixture of emoticons, a few of the more natural of the old-style talk mode abbreviations, and some of the "social" list above. In general, though, MUDders express a preference for typing things out in full rather than using abbreviations; this may be due to the relative youth of the MUD cultures, which tend to include many touch typists. Abbreviations specific to MUDs include: FOAD, ppl (people), THX (thanks), UOK? (are you OK?).

Some BIFFisms (notably the variant spelling "d00d") and aspects of ASCIIbonics appear to be passing into wider use among some subgroups of MUDders and are already pandemic on chat systems in general.

See also hakspek.

Suck article "Screaming in a Vacuum".
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A text communication via keyboard in real time between two or more users on a local network (LAN) or over the Internet. Although the original use of the term was only for text, "chat" became popular for every two-way communication. Audio and voice evolved into "audio chat" and "voice chat." Videoconferencing and video calling became "video chat."

Live Chat for Support
Live text chat is a common website support system, allowing someone to be assisted by a company representative, who typically handles more than one site visitor at a time. Live chat is also called "live help" and "live support."

Chat, Texting and Instant Messaging
All three terms are used synonymously. Texting (SMS) is built into every cellphone and usage only requires the recipient's phone number. All other chat services use a computer or phone app. Some require establishing an account and creating a contact list (see text messaging and instant messaging).

Chatting Was Always Verbal
Before text chat became popular, "chatting on any phone" meant talking. See chat room, video chat and IRC.

A Website Live Chat
A live chat on a website is very helpful for potential customers such as this example on Although the young woman's headset might imply a voice call, this "Chat Live" session is text only.
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References in periodicals archive ?
As shown in Figure 1, the DPPH radical scavenging activities of various investigated extract n-Butanol and Ethyl acetate of Catha Edulis with age 3 years were in order of AcOEt extract (95.92%) at concentration 20 [micro]g/ml > n-BuOH extract (90.00%) at concentration 50 [micro]g/ml.
A Histopathological investigation of long-term feeding Catha edulis leaves in animals.
Also, increased plasma levels of alkaline phosphatase, alanine aminotransferase and indirect bilirubin were found in rabbits after three months of Catha edulis exposure (Al-Mamary et al.
In particular, grazing mammals in dryland regions are especially dependent on shrubs such as khat, and cathinone may have evolved in Catha as protection against mammalian grazing.
Khat (Catha edulis) generates reactive oxygen species and promotes hepatic cell apoptosis via MAPK activation.
Moreover, DAPPI-MS has been used coupled with quadurople-ion trap MS and MS/MS mode to analyze directly herbal products such as Catha edulis, Phycybe mushoms, opium, designer drugs in tablets, confiscated drug samples of several forms as tablets, blotter paper, plant resin, and powder forms that contain meta-chlorophenylpiperazine, 3-fluoromethamphetamine, methylenedioxypyrovalerone, amphetamines, phenazepam, buprenorphine, and methylone.
Khat originates from the evergreen shrub Catha edulis, which is indigenous to several East African countries.
Ali, "A pilot community-based study on association of Khat (Catha edulis) chewing practice with psychosis in Yemen," American Journal of Health Research, vol.
The types of foods taken (fruits, vegetables, meat, fish, and chicken) were classified into the following: no, infrequently (<2 servings/week), and frequently (>2 servings/week); tea consumption: no, within or after meal, and frequently (>4 times/day); coffee and cola consumption (yes or no/week) after meal; fitness, khat (Catha edulis) chewing, and smoking habit defined as yes or no.
In 2016, there were continued seizures by Senegalese law enforcement authorities of the Catha Edulis (khat) plant as well as multi-ton quantities of marijuana.
Khat (Catha edulis) is a bush native of the Horn of Africa and the Arabic Peninsula, where its leaves are traditionally chewed in social gatherings.