positive most-significant-other

A personal significant other—spouse, lover, close friend, parent, child—who provides positive mental and/or material support
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

positive most-significant-other

Psychology An MSO–spouse, lover, close friend, parent, child, who provides positive mental and/or material support. See Most-significant-other. Cf Negative most-significant-other.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.