harmonic progression

noun, Mathematics
1.
a series of numbers the reciprocals of which are in arithmetic progression.
Origin
1865-70
British Dictionary definitions for harmonic progression

harmonic progression

noun
1.
a sequence of numbers whose reciprocals form an arithmetic progression, as 1, 1/2, 1/3, …
harmonic progression in Science
harmonic progression  
A sequence of quantities whose reciprocals form an arithmetic progression, such as 1, 1/3 , 1/5 , 1/7 , .... and so on.