noun. the cardinal number that is the sum of three and one.
- Little Joe
Sentences with tetrad
Bacteria are arranged in patterns, the most common of which are diplo, staphylo, strepto, tetrad and sarcina; these arrangements can be applied to the various bacterial shapes.
2. Noun, singular or mass
Random in this sense means that there is an equal chance that the mother-derived chromatids in a tetrad will line up on either side of the division line.