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Which astronomer introduced the word focus as a mathematical term?

focus

[foh-kuhs] / ˈfoʊ kΙ™s /
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:

It was a key recommendation of the UK Covid Inquiry, and has been a focus for campaigners.

From BBC ● Oct. 16, 2026

Treasury yields will remain in focus over the coming week.

From The Wall Street Journal ● Oct. 16, 2026

The announcement follows news earlier this month that production on the film had been temporarily paused so Reeves could focus on dealing with the family matter.

From Los Angeles Times ● Oct. 16, 2026

G7 nations pledged on Thursday to mobilise $2.5 billion to assist countries at risk of food insecurity, with a specific focus on fertilisers.

From Barron's ● Oct. 16, 2026

Thus Phineas is left with the ability to keep his balance, to focus his attention, and to remember both old and new events.

From "Phineas Gage" by John Fleischman

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

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

From Textbooks ● Sep. 23, 2020

The Sun is one of the foci of the elliptical orbit.

From Textbooks ● May 6, 2020

The ratio of the distance between the foci to the length of the major axis is called the eccentricity of the ellipse.

From Textbooks ● Oct. 13, 2016

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

The Independent focuses on what it says is a "pivotal week" in the war in Ukraine, as the White House looks to cut diesel prices further by easing sanctions on Russia's shadow fleet.

From BBC ● Oct. 16, 2026

Suk’s scholarship focuses on the processes of constitutional amendment and reform and the feminist constitutional movements.

From Slate ● Oct. 16, 2026

As a result, the IFS—a nonpartisan research body that focuses on the budget—estimates that the government’s headroom will likely be little changed at around 20 billion pounds.

From The Wall Street Journal ● Oct. 12, 2026

Legislators have proposed instead using a different index, the CPI-E, which focuses on costs faced by the elderly including healthcare, housing, utilities, groceries and insurance.

From MarketWatch ● Oct. 12, 2026

He focuses his mind, doesn't want to be numb.

From "The Boy Who Dared" by Susan Campbell Bartoletti

"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

“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

This latest research focusses on how this happens at the structural level.

From Science Daily ● Dec. 5, 2023

However MP Gholamreza Nouri-Qezeljeh warned that the move came with "dangers", especially since a large portion of the bill focusses on "criminalising and punishing" hijab-related violations.

From BBC ● Aug. 13, 2023

For him the light focusses now to one vision, Shot through its beautiful heart with black terror, Terror from weakness, remorse and leave-taking.

From Songs, Sonnets & Miscellaneous Poems by Thomas Runciman

Beijing's efforts to tackle the war in Gaza have focused on Palestinian unity.

From BBC ● Oct. 16, 2026

With the BOK focused on keeping inflation expectations in check, Morgan Stanley expects further rate increases in November and the first quarter of 2027.

From The Wall Street Journal ● Oct. 16, 2026

The study wasn’t focused on healthcare specifically, but it raises important questions about whether patients and doctors using different languages can reliably receive consistent information about diagnoses, treatment options, and medical risks.

From Slate ● Oct. 16, 2026

“Right now, L.A. is focused on the first half and ignoring the second.”

From Los Angeles Times ● Oct. 16, 2026

Coal focused on calming his mind and his skin gradually returned to normal.

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

The college said mental health staff have been too focussed on treating symptoms rather than exploring how past traumatic experiences can still affect patients.

From BBC ● Aug. 26, 2026

But that didn't stop its shares from surging nearly 10 percent on Thursday, as investors focussed on its profit outlook.

From Barron's ● Aug. 14, 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

“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

Saturday’s demonstrations will be different, focusing instead on voter-participation drives.

From Los Angeles Times ● Oct. 15, 2026

“Medicare Advantage plans are leaning toward focusing on margin repair,” said Michael Ha, an analyst with Baird.

From The Wall Street Journal ● Oct. 15, 2026

He argues that focusing on the "science of learning" paid dividends with England's move up international education rankings.

From BBC ● Oct. 15, 2026

Instead of focusing directly on damaged cartilage, it targets the abnormal blood vessels that develop around an inflamed joint.

From Science Daily ● Oct. 14, 2026

I distracted myself by focusing on the birds that had perched on the tree stumps, one holding its wings fully outstretched as if to dry its feathers in the breeze.

From "Flying Through Water" by Mamle Wolo

"Additionally, some trade unions are devoting energy to local consultations to mitigate the impact on those colleagues in detriment – focussing on providing specific solutions."

From BBC ● Sep. 24, 2026

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

From BBC ● May 27, 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

What is the multi-trillion pound industry focussing on in 2026?

From BBC ● Jan. 2, 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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