Enveloped: possessing an outer (bounding) lipoprotein bilayer membrane.
Positive-sense (= plus strand, message strand) RNA: the strand that contains the coding triplets that are translated by ribosomes.
Positive-sense DNA: the strand that contains the same base sequence as the mRNA. However, mRNAs of some dsDNA viruses are transcribed from both strands and the transcribed regions may overlap. For such viruses this definition is inappropriate.
Negative sense (= minus strand); for RNA or DNA, the negative strand is the strand with base sequence complementary to the positive-sense strand.
Pseudotypes: enveloped virus particles in which the envelope is derived from one virus and the internal constituents from another.
Surface projections (= spikes, peplomers, knobs); morphological features, usually consisting of glycoproteins, that protrude from the lipoprotein envelope of many enveloped viruses.
Virion: morphologically complete virus particle.
Viroplasm: (= virus factory, virus inclusion, X-body); a modified region within the infected cell in which virus replication occurs, or is thought to occur.
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