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Which astronomer introduced the word focus as a mathematical term?

focus

[foh-kuhs] / ˈfoʊ kəs /
NOUN
center or object of attention
Synonyms
Antonyms




NOUN
point at which light or sound converge
Synonyms


Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

But her focus is on a different element of Kerr’s statement: Which students?

From Los Angeles Times Sep. 22, 2026

Increasingly, the focus is shifting toward what the brain is actually doing during the night and whether that sleep is biologically restorative.

From Science Daily Sep. 22, 2026

Oil prices rose Tuesday as continued risks to shipping through the Strait of Hormuz kept Middle East supply concerns in focus, while investors awaited signs of diplomatic progress over the Iran conflict.

From The Wall Street Journal Sep. 22, 2026

Fashion Britain is the British Fashion Council's initiative to open up access to talent outside of London - so how do you shift the focus away from the traditional centre of that world?

From BBC Sep. 22, 2026

I focus on the ice in the bottom of my cup, try to pretend I can’t feel the weight of his stare.

From "Red Flags and Butterflies" by Sheryl Azzam

The fasting mice had better blood values, less fatty liver and liver inflammation and above all: they developed less liver cancer and had fewer cancer foci in the liver.

From Science Daily May 7, 2024

One of the foci will be located at the origin.

From Textbooks Dec. 21, 2021

Identify the center, vertices, co-vertices, and foci of the ellipse.

From Textbooks Sep. 23, 2020

What can be said about the symmetry of the graph of an ellipse with center at the origin and foci along the y-axis?

From Textbooks Sep. 23, 2020

Even therapeutic measures have the important result not only of curing the patient but of reducing the foci of infection.

From "Silent Spring" by Rachel Carson

Conventional retirement planning focuses on what you should do for 30 or 40 years to be financially prepared.

From MarketWatch Sep. 22, 2026

In “Voice of a Century,” Anthony Tommasini focuses attention on the contralto’s considerable artistry—how it developed and what made her special.

From The Wall Street Journal Sep. 18, 2026

The company has been pivoting to a broader platform and strategy — a “relationship-based selling” approach, whereby it focuses on catering to existing customers and selling them new products.

From MarketWatch Sep. 17, 2026

One emerging area of climate research focuses on atmospheric methane removal.

From Science Daily Sep. 15, 2026

Dad keeps his voice soothing as he focuses on the parking situation.

From "Blended" by Sharon M. Draper

"The metallic tip acts like an antenna and focusses the electromagnetic field in a tiny area below its apex."

From Science Daily Nov. 20, 2024

The effect is comparable in certain respects to when a camera focusses on one subject and blurs out the foreground and background.

From BBC Sep. 4, 2024

“This shocking news focusses our minds on Michael’s wife Clare and their sons,” said Roy Taylor, a professor of medicine and metabolism at Newcastle University who co-authored “The 8-Week Blood Sugar Diet” with Mosley.

From Seattle Times Jun. 7, 2024

The unemployment rate has fallen from 8.5% in 2011 to 3.8% in 2023, said the think tank, which focusses on improving the living standards for those on low to middle incomes.

From BBC Apr. 14, 2024

Remark: The value of the theorem is that it focusses our attention on the perceptions that we have to deal with when judging the arguments in this book.

From Definition & Reality in the General Theory of Political Economy by Thomas Colignatus

Investors are focused on the United Nations General Assembly annual meeting, where leaders are expected to push for de-escalation in the Middle East, DBS strategists say in a note.

From The Wall Street Journal Sep. 22, 2026

In the first part of Viking’s study, which focused on weight loss, 180 adults with obesity received either the drug or the placebo once a week.

From MarketWatch Sep. 22, 2026

The team, led by Srinivasan Revathi, focused on two natural additives.

From Science Daily Sep. 22, 2026

The prime minister will also announce the start of work on a new AI and Autonomy partnership between the UK and the US, focused on protecting critical national infrastructure using AI tech.

From BBC Sep. 22, 2026

For the moment he was focused only on one of them.

From "Boy 2.0" by Tracey Baptiste

The first minister's speech focussed on reform of the public sector to save money, cut bureaucracy, and improve how services are delivered.

From BBC Sep. 2, 2026

Across Caracas and La Guaira, many were focussed instead on Sunday services in churches to remember those lost and still missing.

From Barron's Jul. 5, 2026

Aligned with the Value Jersey movement, his campaign focussed heavily on the cost of living on the island.

From BBC Jun. 9, 2026

"We're currently focussed on the Grand Final of the 70th Eurovision Song Contest in Vienna, with 25 incredible songs and artists from across Europe and Australia competing," they said.

From BBC May 15, 2026

“Partly on his interest being focussed on what he calls ‘the soul,’ which he persists in regarding as an entity independent of the physical environment, whereas, as I tried to point out to him ...”

From "Brave New World" by Aldous Huxley

Sullivan has argued that medical countermeasures should be developed more broadly for pathogens capable of causing severe illness or death in humans, rather than focusing only on viruses already known to cause frequent outbreaks.

From Science Daily Sep. 20, 2026

The company, which originally focused on photonics for industrial applications and eventually moved into telecommunications, is now focusing on AI.

From MarketWatch Sep. 19, 2026

Nnadi says M&S has been investing heavily in its retail spaces in recent years, focusing on "accessible luxury" with stores that feel "welcoming, new and fresh".

From BBC Sep. 18, 2026

Investors are focusing on the Bank of Japan’s policy meeting and Gov. Kazuo Ueda’s press conference later Friday to infer the pace of future rate increases.

From The Wall Street Journal Sep. 18, 2026

I narrow my eyes, focusing only on her and Jay, who's riding on her shoulder as unruffled by the commotion as she is, and we finally make it to the other side.

From "Born Behind Bars" by Padma Venkatraman

"We spent the first 20 years of this century focussing almost entirely on counter-terrorism and counter-insurgency," said Sir Alex Younger, who was Chief of the Secret Intelligence Service from 2014-2020.

From BBC Sep. 10, 2026

AI has shaken the cyber-security world, with concerns focussing on Mythos in particular.

From BBC May 27, 2026

He described the Scottish election result as "disappointing and hurtful" and took full responsibility for the strategy of focussing the campaign on constituencies rather than the list vote.

From BBC May 10, 2026

Dr Becks Fisher said, of the Nuffield Trust think tank, said the service will be helpful for some and focussing on menopause and menstrual health "makes sense" given the long waits for gynaecology services.

From BBC Jan. 5, 2026

Occasionally, focussing on a linguistic alteration can mislead us into thinking that something important has happened when it hasn’t, or that something happened at a particular moment when it actually happened earlier.

From "The Invention of Science" by David Wootton




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