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The protein coat that constitutes the shell of a virus particle.

[From Latin capsa, box.]


(Animals) any heteropterous bug of the family Miridae (formerly Capsidae), most of which feed on plant tissues, causing damage to crops
[C19: from New Latin Capsus (genus)]


(Biochemistry) the outer protein coat of a mature virus
[C20: from French capside, from Latin capsa box]


(ˈkæp sɪd)

the coiled or polyhedral structure, composed of proteins, that encloses the nucleic acid of a virus. Also called protein coat.
[1960–65; < French capside= Latin caps(a) case2 + -ide -id1]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.capsid - a variety of leaf bugcapsid - a variety of leaf bug    
leaf bug, plant bug - small bright-colored insect that feeds on plant juices
four-lined leaf bug, four-lined plant bug, Poecilocapsus lineatus - yellow or orange leaf bug with four black stripes down the back; widespread in central and eastern North America
lygus bug - vector of viral plant diseases
2.capsid - the outer covering of protein surrounding the nucleic acid of a virus
virion - (virology) a complete viral particle; nucleic acid and capsid (and a lipid envelope in some viruses)
protein - any of a large group of nitrogenous organic compounds that are essential constituents of living cells; consist of polymers of amino acids; essential in the diet of animals for growth and for repair of tissues; can be obtained from meat and eggs and milk and legumes; "a diet high in protein"
References in periodicals archive ?
Another research group says it may already have a drug that reduces infection by manipulating HIV's p24 capsid.
The vaccine, to be produced in tobacco plants, targets the L2 protein, an integral part of the papillomavirus capsid.
Objective: The capsid proteins of viruses have been shown to organize around a variety of non-biological polyanions, in a similar way that proteins assemble around RNA genomes, to form virus-like particles (VLPs).
Noroviruses are genetically diverse, and differences in the major capsid protein (VP1) have led to their classification into 6 genogroups (GI-GVI) and [approximately equal to] 30 genotypes.
The work is the culmination of studies carried out over the last decade looking at different portions of the cone-shaped container, or the capsid.
The first filing covers rMB, Bacilligen's improved bladder cancer therapy, and the second, BVS, Bacilligen's bacteriophage-based capsid vector system for delivery of genetic vaccines and therapeutics, and rapid biological manufacturing.
Alternatively, we propose to modify the Ad capsid or LV envelope using epitopes identified by in vivo biopanning that bind to PR and.
4 capsid sequences, which were not typeable in the Norovirus Typing Tool database, and only 2 (4.
Instead of detecting a single specific protein associated with the invader, they detect repetitive molecules linked together, such as those found in a bacterial cell wall or viral capsid.
On the basis of amino acid or nucleotide sequencing of the polymerase and capsid regions, NoV can be divided into 6 genogroups (GI-GVI) and several genotypes.
3Spray Caryopteris with a systemic insecticide to prevent capsid bug damage.
7 CHRYSANTHEMUMS should be inspected regularly and sprayed where necessary against aphids and capsid bug.