`hemato-' is a combining form in words like `hematology'.
Examples of combining form
combining form
One out of every five rebounds into space, combining to form an atom of hydrogen.
From the en.wikipedia.org
They migrated across the surface, occasionally combining to form a supercontinent.
From the en.wikipedia.org
Combining form and function, the Acer H233H bmid 23-inch widescreen high-definition LCD display offers consumers superb high-definition picture quality in a sleek design.
From the techcrunch.com
An example is antimatter and matter combining to form pure gamma radiation.
From the en.wikipedia.org
The continents migrated across the surface, occasionally combining to form a supercontinent.
From the en.wikipedia.org
This image also promoted a new form of chic by combining jeans with haute couture.
From the en.wikipedia.org
Lichens are unusual because they actually consist of two completely separate living things, combining to form one entity.
From the iwcp.co.uk
Spoken Word Poetry is an art form combining theatre and poetry.
From the scoop.co.nz
At some point the hydrogen and helium atoms start combining to form molecules in certain cold regions of these clouds.