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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 ?
The company said the SP263 test evaluates patient PD-L1 status using both tumor and immune cell staining and scoring within the tumor microenvironment, providing clinicians with information that may guide treatment decisions.
Negative staining of adjacent stromal cells resulted in a sample being scored not evaluable, regardless of tumor cell staining seen in the sample.
Cell staining revealed characteristic skin thickening at those signal centers.
Thanks to its capacity for staining in basal cell layer, we hypothesized that GSTP1 could be used to discriminate benign prostatic hyperplasia and PIN (which maintains basal cell staining uniformity) from PCa (which lacks a basal layer).
Tenders are invited for Supply of Scientific Equipments/ Instruments for Samrat Ashoka Tropical Disease Research Centre : Coagulometer; Blood Culture system Shaker for Automatic Blood Cell counter, OIIC Centrifugal Hematology System with , Malaria Test Component, Rilirubinometcr Scini-Autoanalyscr, Automatic slide processing and cell staining system Cell Counter (fully automated) 5 pans Cryostat Micro Tome, Paraffin Embedding System, Urine Chemistry Analyzer, High Throughput PCR Machine, Cold/ Refrigerated High Speed Centrifuge, Cooling micro centrifuge, Table Top Microccntrifugc machine, Dry Bath, Deep freezer (-204C) Deep freezer Horizontal -70"C)Refrigerator (4%JC),
For cell surface staining, 1 ^L of purified anti-mouse CD16/32 antibodies in 24 ^L of cell staining buffer (formulated to prevent nonspecific staining) was added to 1 x [10.
In the current study, we found that all TE cases demonstrated strong CD10 staining of the stromal cells with accentuation around the tumoral nests, but no TE tumor cell staining.
In some cases, but not all, IHC slide scoring can be improved by avoiding overinterpretation of sample edges, retraction artifacts, under- or overfixation artifacts, cases with substantial staining of benign ductal and lobular cells, staining of tumor cell cytoplasm, and membranous tumor cell staining that lacks a complete circumferential staining pattern (2).