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Rh

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Physiology.
  1. Rh factor.

Rh

Symbol, Chemistry.
  1. rhodium.

RH

or rh

  1. Meteorology. relative humidity.

r.h.

  1. right hand.

R.H.

  1. Royal Highness.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for rh

rh

RH

abbreviation for
  1. right hand

Rh

the chemical symbol for
  1. rhodium
abbreviation for
  1. rhesus (esp in Rh factor)

RH

abbreviation for
  1. Royal Highness
  2. (Republic of) Haiti (international car registration)
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

rh in Science

Rh

  1. The symbol for rhodium.

rhodium

[rōdē-əm]
Rh
  1. A rare, silvery-white metallic element that is hard, durable, and resistant to acids. It is used as a permanent plating for jewelry and is added to platinum to make high-temperature alloys. Atomic number 45; atomic weight 102.905; melting point 1,966°C; boiling point 3,727°C; specific gravity 12.41; valence 2, 3, 4, 5, 6. See Periodic Table.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.