A small, square glass or plastic dish, having ruled orientation lines that is used in biological experiments such as agar diffusion assays, propagation of bacteria and fungi, culture and screening of bacteria and yeast colonies.

Alternative spelling of assay dish

(analytical chemistry, chemistry) A flat plate with multiple "wells" used as small test tubes.

plural of assay plate

(biochemistry) A type of assay using gel electrophoresis, in which the mobility of a DNA or RNA probe alone is compared to its mobility in combination with a particular protein, so as to measure the degree and nature of binding between the protein and DNA or RNA.

A standard quantity used in assaying, equal to 29+¹⁄₆ grams (the short assay ton) or 32+²⁄₃ grams (the long assay ton).

plural of assay ton

A small standard weight used in assaying bullion, etc., sometimes equal to half a gram, but varying between assayers.

plural of assay pound

plural of assay dish