Defn: Blood formative; — applied to a substance in early fetal life, which breaks up gradually into blood vessels.

HAEMATOPORPHYRIN
Hæm`a*to*por"phy*rin, n. Etym: [Hæmato- + Gr. (Physiol. Chem.)

Defn: See Hæmatoin.

HAEMATOSAC
Hæm"a*to*sac`, n. Etym: [Hæmato- + sac.] (Anat.)

Defn: A vascular sac connected, beneath the brain, in many fishes, with the infundibulum.

HAEMATOSCOPE
Hæm"a*to*scope`, n.

Defn: A hæmoscope.

HAEMATOSIN
Hæm`a*to"sin ( or ), n. (Physiol. Chem.)

Defn: Hematin. [R.]

HAEMATOSIS
Hæm`a*to"sis, n.