Mainnet

An independent blockchain running its own network with its own technology and protocol. It is a live blockchain where its own cryptocurrencies or tokens are in use, as compared to a testnet or projects running on top of other popular networks such as Ethereum.

Margin Call

When an investor’s account value falls below the margin maintenance amount. The broker will then demand that the investor deposit additional money or securities to meet the minimum required maintenance amount to continue trading.

Margin Trading

A practice where a trader uses borrowed funds from a broker to trade a cryptocurrency, which forms the collateral for the loan from the broker. It can be relatively risky for inexperienced traders who may receive a margin call if the market moves in the opposite direction of their trades.
* Margin Bear Position: The position you are taking if you are going “short” on margin.
* Margin Bull Position: The position you are taking if you are going “long” on margin

Market

An area or arena, online or offline, in which commercial dealings are conducted. Usually referred to as the “crypto market”, which refers to the cumulative cryptocurrencies and projects operating within the industry.

Market Capitalization / Market Cap / MCAP

Total capitalization of a cryptocurrency’s price. It is one of the ways to rank the relative size of a cryptocurrency.

Market Cap = Current Price x Circulating Supply

Market Order / Market Buy / Market Sell

A purchase or sale of a cryptocurrency on an exchange at the current best available price. Market orders are filled as buyers and sellers are willing to trade. This is in contrast with limit orders at which a cryptocurrency is sold only at a specified price.

Masternodes

Masternodes are a server maintained by its owner, somewhat like full nodes, but with additional functionalities such as anonymizing transactions, clearing transactions, and participating in governance and voting. It was initially popularized by Dash to reward owners of these servers for maintaining a service for the blockchain.

Max Supply

The best approximation of the maximum amount of coins that will ever exist in the lifetime of the cryptocurrency.

mBTC

m฿ or mBTC are MilliBitcoin. 1 mBTC is equal to 0.001 Bitcoin "BTC".

Merkle Tree

A tree structure in cryptography, in which every leaf node is labelled with the hash of a data block and every non-leaf node is labelled with the cryptographic hash of the labels of its child nodes. Hash trees allow efficient and secure verification of the contents of blockchains, as each change propagates upwards so verification can be done by simply looking at the top hash.

MicroBitcoin (uBTC)

One-millionth of a bitcoin or 0.000001 of a bitcoin. Often confused as a fork of Bitcoin.

Microtransaction

A business model where very small payments can be made in exchange for common digital goods and services, such as pages of an ebook or items in a game.

Mineable

Some cryptocurrencies have a system through which miners can be rewarded with newly-created cryptocurrencies for creating blocks through contributing their hash power. Cryptocurrencies with this ability to generate new cryptocurrencies through the process of confirmation is said to be mineable.
* Not Mineable: Some cryptocurrencies are generated only through other mechanisms, such as annual inflation through staking. These cryptocurrencies are said to be not mineable.

Miners

Contributors to a blockchain taking part in the process of mining. They can be professional miners or organizations with large-scale operations, or hobbyists who set up mining rigs at home or in the office.

Mining

A process where blocks are added to a blockchain, verifying transactions. It is also the process through which new bitcoins or some altcoins are created.

Mining Contract

Another term for cloud mining, where users can rent or invest in mining capacity online.

Mining Pool

A setup where multiple miners combine their computing power to gain economies of scale and competitiveness in finding the next block on a blockchain. Rewards are split according to different agreements, depending on the mining pool. Another term for this is Group Mining.

Mining Reward

The reward resulting from contributing computing resources to process transactions. Mining rewards are usually a mix of newly-minted coins and transaction fees.

Mining Rig

A computer being used for mining. A mining rig could be a dedicated piece of hardware for mining, or a computer with spare capacity that can be used for other tasks, only mining part-time.

Minnow

Another term used to describe Fish.

Mixing Service

Also known as Tumbler, it is a service to improve the privacy and anonymity of cryptocurrency transactions by mixing potentially identifiable or “tainted” cryptocurrencies with other unrelated transactions, making it harder to track what the cryptocurrency was used for and who it belongs to.

Mnemonic Phrase

A mnemonic phrase (also known as mnemonic seed, or seed phrase) is a list of words used in sequence to access or restore your cryptocurrency assets. It should be kept secret from everyone else. It is a standard in most HD wallets.

Mnemonics

Mnemonics are memory aids with a system such as letters or associations that help in recall.

Money Transmitter/Money Transfer License

In the legal code of the United States, a money transmitter or money transfer service is a business entity that provides money transfer services or payment instruments, whether it is real currency, cryptocurrency, or any other value. Money Transmitters in the US are part of a larger group of entities called money service businesses or MSBs.

Moon

A situation where there is a continuous upward movement in the price of a cryptocurrency. Often used in communities to question when a cryptocurrency will experience such a phenomenon, saying: “When moon?” It is usually combined with “When Lambo?”

Moving Average Convergence Divergence (MACD)

A technical analysis method, it is a trend-following momentum indicator that shows the relationship between two price moving averages. The calculation is done by subtracting the 26-day exponential moving average (EMA) from the 12-day EMA.

Mt. Gox

Mtgox or Mt. Gox was one of the first websites where users could take part in fiat-to-bitcoin exchange (and vice versa). In 2014, Mt. Gox was shut down after about 850,000 bitcoin was declared lost or stolen. Mt. Gox was created in 2006 by Jed McCaleb who named it after Magic: The Gathering Online Exchange where users could use the cards like stocks. Jed later sold Mt. Gox to Mark Karpelès in 2011.

Multi-Signature (Multi-sig)

Multi-signature addresses provide an added layer of security by requiring more than one key to authorize a transaction.