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Related to Biological stain: Biological Stain Commission


v. stained, stain·ing, stains
1. To discolor, soil, or spot: The spilled juice stained the carpet.
2. To bring into disrepute; taint or tarnish: The scandal stained the mayor's reputation.
3. To change the color of (a piece of wood, for example) by applying a stain.
4. To treat (a specimen for the microscope) with a reagent or dye in order to identify cell or tissue structures or microorganisms.
To produce or receive discolorations: upholstery that stains easily.
1. A discolored or soiled spot or smudge: a stain that was difficult to scrub out.
2. A diminishment of one's moral character or good reputation by being associated with something disgraceful.
3. A liquid substance applied especially to wood that penetrates the surface and imparts a rich color.
4. A reagent or dye used for staining microscopic specimens.

[Middle English steinen, partly from Old French desteindre, desteign-, to deprive of color (des-, dis- + teindre, to dye, from Latin tingere), and partly from Old Norse steina, to paint.]

stain′a·ble adj.
stain′er n.
Synonyms: stain, blot1, brand, stigma, taint
These nouns denote a mark of discredit or disgrace, as on one's good name: a stain on his honor; a blot on an otherwise clean police record; the brand of cowardice; the stigma of ignominious defeat; the taint of political corruption.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.staining - (histology) the use of a dye to color specimens for microscopic study
dyeing - the use of dye to change the color of something permanently
Gram method, Gram stain, Gram's method, Gram's procedure, Gram's stain - a staining technique used to classify bacteria; bacteria are stained with gentian violet and then treated with Gram's solution; after being decolorized with alcohol and treated with safranine and washed in water, those that retain the gentian violet are Gram-positive and those that do not retain it are Gram-negative
histology - the branch of biology that studies the microscopic structure of animal or plant tissues
2.staining - the act of spotting or staining somethingstaining - the act of spotting or staining something
dirtying, soiling, soilure - the act of soiling something


(= change in colour)(Ver)färbung f; (= soiling)Verschmutzung f
(esp Tech: = dyeing) → Färben nt; (of wood)Beizen nt


n. coloración, tintura.
References in periodicals archive ?
After finding what appears to be a biological stain at a crime scene, a forensic investigator would simply need to scan the evidence to collect the necessary data," explains Lednev.
Many researchers observed that Sudan red had been considered as a suitable biological stain (Lai, 1977; Su et al.
Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission.
Quality assurance and standardization in immunohistochemistry: a proposal for the annual meeting of the Biological Stain Commission, June, 1991.
A standard fingerprint method for use on paper products was (and still is) ninhydrin, a biological stain which reacts with protein in the fingerprint residue and produces a magenta-coloured fingerprint.
Finding that one fingerprint, biological stain, fibre, or hair which links a suspect to a victim or crime scene is analogous to "Finding the pot of gold at the end of the rainbow" at the culmination of hours, days, or weeks of tedious work.
and European laboratories, uses a biological stain to look for evidence of membrane damage in culture-grown human skin cells.