'blood plate' definitions:

Definition of 'blood plate'

From: GCIDE

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]