n.
Pronunciation: ' mas- ˌ kän
Function: noun
Etymology: 2 mas s + con centration
Date: 1968
: any of the high-density regions below the surface of lunar maria that are held to perturb the motion of spacecraft in lunar orbit
n.
Pronunciation: ' mas- ˌ kän
Function: noun
Etymology: 2 mas s + con centration
Date: 1968
: any of the high-density regions below the surface of lunar maria that are held to perturb the motion of spacecraft in lunar orbit
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012