Title 
Description 

Lambda 
Lambda is the eleventh letter of the Greek alphabet and is used for wavelength in physics.


Lateral 
The flat sides of a geometric solid are generally termed the Lateral sides or Lateral surface area.


Lateral Surface Area 
The Lateral Surface Area of a geometric solid is the expanse of the flat sides (or smooth sides). Be careful, some solids have faces that are termed bases and not lateral surfaces.


Law of Cosines 
The familiar Pythagorean Theorem is a special case of the Law of Cosines.


Law of Sines 
The ratio of the sine of any angle within any specific triangle and the length of the opposite side is a constant.


Leading Coefficient 
Most typically we write polynomials with the first term having the highest order, or power. The coefficient of this leading term is literally the Leading Coefficient.


Leading Term 
The first term in a polynomial, most typically the highestorder term, is the Leading Term of the polynomial.


Least Common Denominator 
When two or more fractions are being summed we want the LCD to facilitate the operation of addition.


Least Common Multiple 
The LCM is most typically applied to integers. It is the smallest value evenly divisible by each number for which we seek the LCM.


Least Upper Bound 
As the name implies, a function often has a highest value or a limit beyond which it may not realize.


Leg, Trapezoid 
The Leg of a Trapezoid is one of the nonparallel sides.


Leg, Triangle 
Most generally the legs of a triangle refer to the perpendicular sides of a right triangle only.


Lemma 
A little, inconsequential theorem is sometimes called a Lemma.


Like Terms 
Like Terms have the same variables raised to identical powers.


Limit 
Some functions have a Limit, a bound beyond which they may not realize.


Line 
A collection of points that comprise the shortest path between two points in Euclidean geometry is a Line; all points in a Line are collinear and, of course, coplanar.


Line Segment 
A section of a line, with endpoints on both ends, is a Line Segment.


Linear 
As the first four letters imply, Linear means "of a line" or "lined up" in a collinear fashion.


Linear Pair 
Two adjacent supplementary angles form a Linear Pair.


Local Maximum 
A Local Maximum is a high spot on the graph of a function. Also termed a relative maximum, it is the greatest value within a defined neighborhood.


Local Minimum 
A Local Minimum is a low spot on the graph of a function. Also termed a relative minimum, it is the least value within a defined neighborhood.


Loci 
The points that comprise a function (or graph thereof) are its Loci.


Locus 
A single point on a function or on its graph is a Locus.


Logarithm 
A Logarithm is a number associated with a power and a base; the function is the inverse of an exponential function.


Logic 
Logic takes many forms and is instrumental in understanding the language of mathematics.


Long Division 
Adolph Hitler actually had two middle names: Long Division. Just kidding. And we should not kid about an evil, pestiferous maniac like Hitler.


Lower Bound 
As the name suggests, some functions are limited on the low side.


Lower Quartile 
Also first quartile, it is the 25th percentile, where 75 percent of the data is greater than this value.


Lower Quintile 
The 20th percentile; also first quintile.

