Protoplast
noun
1.
Biology.
the contents of a cell within the cell membrane, considered as a fundamental entity.
the primordial living unit or cell.
2.
a person or thing that is formed first; original; prototype.
3.
the hypothetical first individual or one of the supposed first pair of a species or the like.
noun
1.
a unit consisting of the living parts of a cell, including the protoplasm and cell membrane but not the vacuoles or (in plants) the cell wall
protoplast pro·to·plast (prō’tə-plāst’)
n.
The living material of a plant or bacterial cell, including the protoplasm and plasma membrane after the cell wall has been removed.
One that is the first made or formed; a prototype.
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- Protopope
noun 1. the ranking priest in a cathedral of the Eastern Church.
- Protoporphyria
protoporphyria pro·to·por·phyr·i·a (prō’tō-pôr-fēr’ē-ə) n. Enhanced fecal excretion of protoporphyrin.
- Protoporphyrin
/ˌprəʊtəʊˈpɔːfɪrɪn/ noun 1. a type of porphyrin that, when combined with an iron atom, forms haem, the oxygen-bearing prosthetic group of the red blood pigment haemoglobin protoporphyrin pro·to·por·phy·rin (prō’tō-pôr’fə-rĭn) n. A metal-free porphyrin that combines with iron to form the heme of iron-containing proteins.
- Protoporphyrin ix
protoporphyrin IX n. A porphyrin derivative that combines with ferrous iron to form the heme of hemoglobin and with ferric or ferrous iron to form the prosthetic groups of substances such as myoglobin, catalase, and the cytochromes.