1.
a group or series of four things or people
2.
a group of four chromosomes in a diploid cell that is about to undergo the cell division that produces sex cells
3.
a group of four cells produced by the division of a single parent cell, e.g. as it occurs in the formation of pollen and spores
4.
an atom or chemical group with a valence of four
1.
a group or series of four things or people
2.
a group of four chromosomes in a diploid cell that is about to undergo the cell division that produces sex cells
3.
a group of four cells produced by the division of a single parent cell, e.g. as it occurs in the formation of pollen and spores
4.
an atom or chemical group with a valence of four