adder
/'ædə/
Definition
- Noun:
- A small venomous snake: A type of viper, specifically the common European viper (Vipera berus), found in parts of Europe and Asia.
- A calculating machine: A device or circuit that performs the arithmetic operation of addition.
- A person who adds: An individual whose role is to perform addition, especially in a historical or computational context.
Examples of Usage
- Noun (Snake):
- We saw an adder basking on the sun-warmed path.
- The adder is the only venomous snake native to Britain.
- Noun (Machine):
- The early computer used a series of adders to perform calculations.
- This circuit functions as a binary adder.
- Noun (Person):
- In the old accounting office, he worked as an adder, checking columns of figures. (This usage is now rare.)
Advanced Usage
- Full adder: A digital circuit that adds three binary digits (two significant bits and a carry-in bit) and produces a sum and a carry-out bit. It is a fundamental component in computer arithmetic logic units.
- The processor's efficiency depends on the speed of its full adders.
- Half adder: A digital circuit that adds two single binary digits and produces a sum and a carry bit. It is a simpler building block than a full adder.
- A half adder can be constructed using an XOR gate and an AND gate.
Variants and Related Words
- Add (verb): To join numbers or quantities together to find their total.
- Please add these two numbers.
- Addition (noun): The process of adding or the result of adding.
- The addition of these columns took a long time.
- Additive (adjective/noun): Characterized by or relating to addition; a substance added to something to alter its properties.
- The process has an additive effect. / This food contains no artificial additives.
Synonyms
- Snake meaning: Viper, serpent.
- Machine/Person meaning: Summer (archaic, for a person who sums), totalizer.
Related Phrases
- Adder's tongue: A name for certain plants, such as ferns in the genus , whose spore-bearing frond is thought to resemble a snake's tongue.
- We found a patch of adder's tongue growing in the meadow.
- Deaf as an adder: An idiom meaning stubbornly unwilling to listen, based on the ancient belief that adders could not hear.
- He was deaf as an adder to all our warnings.
Notes on Different Meanings
The word adder has three distinct meanings that are not closely related. The zoological meaning (the snake) is the most common in everyday language. The computational meanings (machine, person) are technical and primarily used in the contexts of electronics, computer science, and historical job roles. It is important to use context to determine which meaning is intended.
Noun
-
small terrestrial viper common in northern Eurasia
-
a machine that adds numbers
-
a person who adds numbers
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