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(ē-kwā'tŏr), [TA]
A line encircling a globular body, equidistant at all points from the two poles; the periphery of a plane cutting a sphere at the midpoint of, and at right angles to, its axis.
[Mediev. L. aequator, fr. L. aequo, to make equal]


Etymology: L, aequator, equalizer
an imaginary line encircling a globe, equidistant from the poles, used in anatomical nomenclature to designate such a line on a spherical organ, dividing the surface into two approximately equal parts. Also spelled aequator.


[L. aequator]
A line encircling a round body and equidistant from both poles. equatorial, adjective

equator of cell

The boundary of a plane through which the division of a cell occurs.

equator of crystalline lens

The line that marks the junction of the anterior and posterior surfaces of the crystalline lens. The fibers of the suspensory ligament are attached to it.

equator oculi

An imaginary line encircling the eyeball midway between the anterior and posterior poles.


Imaginary line encircling the eyeball and dividing the eye into a front and back half.
Mentioned in: Retinoblastoma

Patient discussion about equator

Q. how do i determine what is the right weight i need to be? i know there is a way to calculate it, an equation , what are the parameters in it ?

A. I don't mean to burst any bubbles, but BMI is definitely not a good way to determine what weight you should be. If you considered that a body builder or a professional athlete is considered obese under BMI standards then you would know what I mean. Here is an article about it I found on Medical News Today: http://www.medicalnewstoday.com/articles/49991.php

More discussions about equator
References in periodicals archive ?
Under this hypothesis, the convectiverolls would first appear near the poles and drift toward the equator.
The UNDP-led partnership for the Equator Initiative brings together the UN, governments, civil society, businesses, and grassroots organizations.
Since their introduction in 2003, the Equator Principles have enabled financial institutions to engage with stakeholders including non-governmental organisations and the private sector to converge on mutual environmental and social principles.
It is tempting to think of the Equator Principles as a substantial step toward enhancing environmental regulations in countries without adequate standards.
Equator Technologies is a provider of high-performance, programmable and power-efficient system-on-a-chip (SoC) processors for video streaming and image processing applications.
The Equator Principles may already be achieving results.
The shadow cast by the planet's giant ice rings also might affect wind speed by blocking varying amounts of sunlight at the equator.
The second mission was a 22-hour test May 1 over the equator west of Hawaii.
Ecuador's proximity to the equator also means that sunscreen is a must at any altitude.
Gases at the sun's equator rotate at a faster rate than those near the poles, circling the sun in about 25 days.
When the Earth spins, it spins all in a piece, so that a point on the Equator, forced to move a length of 25,000 miles in twenty-four hours, must move a little over 1,000 miles an hour.