If you look this up you will find foci (foe-sigh or foke-eye) is the plural for focus. Also focuses. Digging deeper I found some educational sites that prefer foci and they explain it as an irregular noun with a particular ending: so foci is the plural of focus. The singular ends with –us, so the plural ends with –i.
Consequently, is foci singular or plural?
Here’s the word you’re looking for. The noun focus can be countable or uncountable. In more general, commonly used, contexts, the plural form will be foci. However, in more specific contexts, the plural form can also be focuses e.g. in reference to various types of focuses or a collection of focuses.
Beside above, how do you use foci in a sentence? foci in a sentence
- Many large, long-winged birds have multiple wing foci.
- The foci of that ellipse are the zeroes of the derivative.
- The ” interfocal segment ” connects the two foci.
- Its foci have included the music of Afghanistan and poetry events.
- A PhD program is being offered in all four research foci.
Hereof, what does the foci mean?
Definition for foci (2 of 2) a central point, as of attraction, attention, or activity: The need to prevent a nuclear war became the focus of all diplomatic efforts. Physics. a point at which rays of light, heat, or other radiation meet after being refracted or reflected.
What is the noun form of focus?
Noun. focus (countable and uncountable, plural foci or focuses) (countable, optics) A point at which reflected or refracted rays of light converge.
19 Related Question Answers Found
Is foci plural for focus?
Digging deeper I found some educational sites that prefer foci and they explain it as an irregular noun with a particular ending: so foci is the plural of focus. focuses is also an acceptable plural. Focus is from Latin where the plural is foci, it also falls under the irregular noun category so the plural is foci.
How do you find foci?
actually an ellipse is determine by its foci. But if you want to determine the foci you can use the lengths of the major and minor axes to find its coordinates. Lets call half the length of the major axis a and of the minor axis b. Then the distance of the foci from the centre will be equal to a^2-b^2.
What is the full meaning of focus?
1a : a center of activity, attraction, or attention the focus of the meeting was drug abuse put immigration into focus as a hot topic for commentators. b : a point of concentration. 2 : directed attention : emphasis The focus is on helping the homeless.
What is the difference between foci and focus?
As nouns the difference between foci and focus is that foci is (focus) while focus is (countable|optics) a point at which reflected or refracted rays of light converge.
What is the plural of appendix?
The correct plural of appendix depends on the circumstances. When referring to the text at the end of a book or article, either the plural appendices or appendixes is correct. In the sense of the organ, appendixes is the only plural. Compare vacuum, which can pluralize to vacua or vacuums depending on the meaning.
What is the plural of fungus?
The noun fungus has a Latin root, which is the derivation of the plural fungi. Through common usage, funguses (which adheres to the standard rules for forming plurals) is also now acceptable.
What is a foci of cancer?
Focal – Foci – Focus Focus is a pathologic term describing cells that can be seen only microscopically. The cells stand out from surrounding tissue based on their appearance, special stains, or other testing. Foci is the plural of focus and implies only microscopic visualization of the tumor cells.
What does foci mean on an MRI?
BACKGROUND: T2-hyperintense foci are one of the most frequent findings in cerebral magnetic resonance imaging (MRI). They can pose serious diagnostic problems which is reflected by their English name and abbreviation – UBOs (Unidentified Bright Objects).
What are the two foci of an ellipse?
An ellipse has two focus points. One focus, two foci. The foci always lie on the major (longest) axis, spaced equally each side of the center. If the major axis and minor axis are the same length, the figure is a circle and both foci are at the center.
Why are the foci of an ellipse important?
Two fixed points on the interior of an ellipse used in the formal definition of the curve. An ellipse is defined as follows: For two given points, the foci, an ellipse is the locus of points such that the sum of the distance to each focus is constant.
Is a circle an ellipse?
In fact a Circle is an Ellipse, where both foci are at the same point (the center). In other words, a circle is a “special case” of an ellipse. Ellipses Rule!
How many foci does a circle have?
two foci
Why do ellipses have two focuses?
For every ellipse E there are two distinguished points, called the foci, and a fixed positive constant d greater than the distance between the foci, so that from any point of the ellipse, the sum of the distances to the two foci equals d .
Can foci be outside of the ellipse?
In between, the focal points are always inside the ellipse. The eccentricity of an ellipse is always between 0 and 1 so it cannot “go to infinity”. As the distance between foci goes to infinity, the eccentricity goes to 1.
What is foci in the liver?
Diagnosis is often facilitated by identification of hyperintense foci on T1-weighted MR imaging in an otherwise hypointense lesion. This feature is usually related to the presence of fat or hemorrhage, which is most often encountered in primary liver tumors such as hepatocellular carcinoma or adenoma.
How do I find the focus of a parabola?
If you have the equation of a parabola in vertex form y=a(x−h)2+k, then the vertex is at (h,k) and the focus is (h,k+14a). Notice that here we are working with a parabola with a vertical axis of symmetry, so the x-coordinate of the focus is the same as the x-coordinate of the vertex.
What is an example of focus?
verb. Focus is defined as to concentrate on something in particular. Focus is defined as to bring into view. An example of focus is to put all of one’s energy into a science project. An example of focus is to adjust a microscope to better see a specimen.
Whats does forecast mean?
forecast. The act of predicting business activity for a future period of time. Typically, it is a projection based upon specific assumptions, such as targeted prospects or a defined sales strategy. For example, a sales pro forma in a business plan is considered a forecast.
Why is focus important?
Focus is so important because it is the gateway to all thinking: perception, memory, learning, reasoning, problem solving, and decision making. Without good focus, all aspects of your ability to think will suffer. Here’s a simple reality: if you can’t focus effectively, you can’t think effectively.