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  1. Oxford American Dictionary

    H

    • IPA[āCH]

    美式

    • abbr
      hard (used in describing grades of pencil lead)；height (in giving the dimensions of an object)
    • symbol
      enthalpy.；the chemical element hydrogen.

    • noun: H

    • 釋義

    abbr

    • 1. hard (used in describing grades of pencil lead) a 2H pencil
    • 2. height (in giving the dimensions of an object) H 195 cm by W 107 cm by D 52 cm
    • 3. henry(s).
    • 4. informal heroin “Tell me it's not heroin.” “It's not H”

    symbol

    • 1. enthalpy.
    • 2. the chemical element hydrogen.
    • 3. magnetic field strength.