Haematoblast \H[ae]m"a*to*blast\ (-bl[a^]st`), n. [H[ae]mato- +
-blast.] (Anat.)
One of the very minute, disk-shaped bodies found in blood
with the ordinary red corpuscles and white corpuscles; a
third kind of blood corpuscle, supposed by some to be an
early stage in the development of the red corpuscles; --
called also {blood plaque}, and {blood plate}.
[1913 Webster]