I don't know. sorry!
On the Beaufort Scales the definition of one less than a hurricane is a violent storm.
The definition of acidic is having a pH less than 7.
5
It is greater than 90 but less than 180 degrees.
Triangles, by definition, have 180 degrees. Angles that are less than 90 degrees are said to be acute.
The definition of the prefix sub is: Under or less than.
A sediment with particles of less than 4 micrometres diameter.
Undercook is to cook something for less time than it needs.
An angle greater than 180 degrees and less than 360 degrees.
Any element, other than a halogen is - by definition - not a halogen and so it does not have a halogen and that is less than one halogen.
A proper fraction is one in which the absolute value of the numerator (the top) is smaller than the absolute value of the denominator.A sloppy definition would be that the numerator is smaller than the denominator. By that definition, -3/2 should be a proper fraction because -3 is less than 2.
A small assemblage of houses in the country, less than a town or city.