expression (redirected from expressionlessness)

expression /ex·pres·sion/ (eks-presh´un)

1. the aspect or appearance of the face as determined by the physical or emotional state.

2. the act of squeezing out or evacuating by pressure.

3. gene e.

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gene expression 

1. the flow of genetic information from gene to protein.

2. the process, or the regulation thereof, by which the effects of a gene are manifested.

3. the manifestation of a heritable trait.

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ex·pres·sion (k-sprshn)

n.

1. The act of pressing or squeezing out.

2. The outward manifestation of a mood or disposition by mobility of the facial features; facies.

3. The phenotype manifested by a genotype under fixed environmental conditions.

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expression (ek·spreˑ·shn),

n the mechanical method used to extract essential oils from plant material by crushing and applying pressure. Commonly used for extracting fluids from citrus fruits like lemons and oranges.

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expression

1. the aspect or appearance of the face as determined by the physical or emotional state.

2. the act of squeezing out or evacuating by pressure.

3. the manifestation of a heritable trait in an individual carrying the gene or genes which determine it.

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expression library

a number of different DNA molecules cloned into a single expression vector.

expression vector

a cloning vector that carries a gene into the host cell and promotes its expression.