noun.
The anatomical study of the microscopic structure of animal and plant tissues.
noun.
The microscopic structure of tissue.
The Century Dictionary and Cyclopedia
noun.
That branch of anatomy which is concerned with the structure, especially the microscopic structure, of the various tissues of the body; histomorphology.
the GNU version of the Collaborative International Dictionary of English
noun.
That branch of biological science, which treats of the minute (microscopic) structure of animal and vegetable tissues; -- called also histiology.