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base1 US English

The lowest part or edge of something, especially the part on which it rests or is supported

base2 US English

(Of a person or a person’s actions or feelings) without moral principles; ignoble

base1 US Thesaurus

the base of the tower

base2 US Thesaurus

base motives

acid–base US English

(Usually attributive) designating a process, property, etc., involving or dependent on the reaction between an acid and a base.

on-base US English

Baseball. Usually in on-base percentage. Relating to the number of times a player reaches base in relation to his or her at bats.

off-base US English


base box US English

A box serving as the base of an object or structure.

base camp US English

A camp from which mountaineering expeditions set out

base case US English

The particular case of a system being analysed in which no variables are changed from their initial values.

base coat US English

A preliminary coating used to prepare a surface for a subsequent or finishing coat: a substance used as such a coating.

base form US English

The simple form from which the derivatives and inflected forms of a word arise.

base hit US English

A fair ball hit such that the batter can advance safely to a base without aid of an error committed by the team in the field

base jump US English

A parachute jump from a fixed point, typically a high building or promontory, rather than an aircraft

base map US English

A map that shows important basic information, to which can be added more specialized information relevant to a particular study or purpose.

base pair US English

A pair of complementary bases in a double-stranded nucleic acid molecule, consisting of a purine in one strand linked by hydrogen bonds to a pyrimidine in the other. Cytosine always pairs with guanine, and adenine with thymine (in DNA) or uracil (in RNA)

base path US English

The straight-line path from one base to the next, along which a base runner travels while a play is being made

base pay US English

The base rate of pay for a job or activity, excluding additional payments such as overtime or bonuses

base peak US English

The most intense peak in a mass spectrum, conventionally assigned an intensity of 100.

base-poor US English

Containing few basic ions.

base rate US English

(In the UK) the interest rate set by the Bank of England for lending to other banks, used as the benchmark for interest rates generally

base-rich US English

Rich in basic ions (typically calcium and magnesium).

base ring US English

Gunnery a moulding on the breech of a cannon between the base and the first reinforce.

base unit US English

A fundamental unit that is defined arbitrarily and not by combinations of other units. The base units of the SI system are the meter, kilogram, second, ampere, kelvin, mole, and candela

base word US English

A word that serves as a base form.

base year US English

A year used as a starting point for statistical comparisons with subsequent years, especially in economic indexes.

fan base US English

The fans of a sports team, pop music group, etc., considered as a distinct social grouping

home base US English

A place from which operations or activities are carried out; headquarters

oil base US English

An oil used as a main ingredient in, or foundation or medium for, paint, varnish, perfume, or some other product (frequently attributive).

one-base US English

Designating a hit that enables the batter to reach the first base.

oxy-base US English

A base containing oxygen.

sub-base US English

Architecture. The lowest part of a horizontally divided base.

time base US English

A signal for uniformly and repeatedly deflecting the electron beam of a cathode ray tube

word base US English

The simple form from which the derivatives and inflected forms of a word arise; the uninflected or unaffixed form of a word.

asset base US English

The total assets owned by an individual, group, or company which underlie various financial activities or operations; especially those assets on which a company draws or depends for its operation.

base burner US English

A stove or furnace that burns fuel in a chamber at the base which is replenished from above by means of a hopper

base circle US English

The circle from which are generated the involutes forming the profiles of gear teeth, having the form of a circle concentric with the pitch circle but of slightly smaller diameter.

base court US English

Architecture. The lower or outer court of a castle or mansion, occupied by the servants. Also: a court at the back of an early farmhouse, containing the outbuildings.

base dance US English

A dance in slow time consisting of gliding movements and stately posing, the feet being only slightly raised from the ground.

base level US English

The lowest level to which a land surface can be eroded by running water.

base-level US English

To reduce (an area, feature, etc.) to base level by erosion.

base metal US English

A common metal not considered precious, such as copper, tin, or zinc

base-minded US English

Having a base mind; = base.

base model US English

A basic version of a product, to which alterations, additions, and enhancements can be made as desired; specifically the standard (and usually cheapest) model of a motor vehicle.

base-paired US English

Organized into or containing base pairs.

base point US English

The middle point of the base of a shield.

base price US English

The standard price of a product before taking into account any varying factors such as discounts, taxes, additional charges for optional features, etc.

base runner US English

A player on the team at bat who is on a base, or running between bases

base salary US English

The standard minimum salary received by a person, exclusive of any additional compensation such as bonuses or commission.

base stock US English

A certain amount of stock assumed to be constantly held in inventory by a company, as the minimum quantity required to continue operating; frequently attributive, especially designating a method of accounting (not generally regarded as acceptable) in which such stock is valued at its original cost.

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