A result of a test that shows as present something that is absent. / (statistics) type I error

(fencing) An attack that is intended to miss or fall short, so as to produce a reaction from the opponent. Also called a false action.

The chaffweed (Centunculus minimus). / A type of figwort (Lindernia dubia), found in wet or muddy places.

(cartography) A value relating to distance north of a standard latitude but with a constant added to make the numbers convenient. For instance, in UTM, the Southern Hemisphere is assigned negative degrees of latitude, but to avoid negative numbers in northings, a constant value of 10,000,000 is added so that negative numbers for northings do not occur.

(cartography) A value relating to distance east of a standard meridian but with a constant added to make the numbers convenient. For instance, in UTM the value 500,000 is added to the easting from the center of each zone to return a false easting that is never negative (the smallest true easting is approximately -340,000 which is set to false easting of 160,000).

plural of false friend

(botany) A fruit which includes tissue not derived from the ovary but some adjacent tissue.

dentures

A deciduous tree, Robinia pseudoacacia, native to the United States; the black locust

(fencing) false attack.