Thoma,Richard, German histologist, 1847-1923.
Thoma ampulla - a dilation of the arterial capillary beyond the sheathed artery of the spleen.
Thoma fixative - nitric acid in 95% alcohol, used for decalcifying bone in the preparation of histologic specimens.
Thoma law - the development of blood vessels is governed by dynamic forces acting on their walls.
Thoma-Zeiss apparatus - Synonym(s): Abbé-Zeiss apparatus