English words containing rotos:
Meanings of Protospore:
nounOriginally: an early stage in fungal spore development believed to be analogous to the prothallus in ferns. in later use: specifically a uninucleate segment formed by the cleavage of a multinucleate mass of cytoplasm from which the spore or sporangium develops.
Meanings of Protostar:
nounA contracting mass of gas which represents an early stage in the formation of a star, before nucleosynthesis has begun.
Usage examples:
Elongated chains of dust grains like these appear in the early stages of planet formation around a …
Meanings of Protostele:
nounA type of stele typical of primitive plants (still found in, e.g., the seedling stages of many ferns) that lacks pith and consists of a solid core of xylem surrounded by a cylinder of phloem.
Meanings of Protosulphate:
nounA sulphate in which the sulphate anion occurs in its smallest possible proportion relative to the other element (i.e. one in which the other element occurs in its lowest oxidation state). compare "proto-", persulphate .
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