Rh

1. abbreviationmedicineAbbreviation of Rhesus factor.
2. abbreviationmedicineAbbreviation of Rhesus.

plural RHs

1. abbreviationcountableinitialismuncountableInitialism of relative humidity.
2. abbreviationcountableinitialismuncountablebusinessInitialism of right hand.

   Work wraps together with wrapped sts as you come to them, as follows: Insert RH ndl into wrap at base of wrapped st from beneath, then bring RH ndl up and into st on LH ndl, ready to work the st[…]

   2012, Stefanie Japel, Mom and Me Knits, page 13

   1 more example

   Having had to keep to a LH wristie (albeit indoors), I can say that it's a bloody nightmare when compared to the RH leggie. It's OK with a LH bat, but you don't ever get to see much of the ball otherwise since it's going sharply across the batsman's body.

   2000 December 30, Moby Dick, “Australian Captaincy”, in india.sport.cricket (Usenet), archived from the original on 03 Jun 2026

3. abbreviationcountableinitialismuncountableInitialism of review hearing.
4. USabbreviationcountableinitialismuncountableaeronauticsInitialism of reconnaissance helicopter.
5. abbreviationcountableinitialismuncountablelifestyleInitialism of reverse harem