What is the proper term for lines of constant volume and constant enthalpy on a thermodynamic diagram?

I know an isotherm is a line of constant temperature.
Isobar is a constant pressure line.
Isentrope is a line of constant entropy.


But what do you call a line of constant volume? An Isochore?
And what do you call a line of constant enthalpy? An "isenthalp"?





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> But what do you call a line of constant volume? An Isochore?
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Correct.



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> And what do you call a line of constant enthalpy?
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The process is isenthalpic. More than one engineering/thermodynamic text I found by Googling indicates they are simply referred to as "isenthalpic lines." See [this](https://books.google.com/books?id=Sx7SBQAAQBAJ&pg=SA7-PA20&lpg=SA7-PA20&dq=isenthalpic+lines&source=bl&ots=xSF_BQVcwI&sig=IPZ_A05qJTbneadLLbj2IcQAhQM&hl=en&sa=X&ei=NtGfVbyABNCQyATWgK7gDg&ved=0CDYQ6AEwBQ#v=onepage&q=isenthalpic%20lines&f=false) for example.


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