primer (redirected from priming coat)

primer¹

an introductory text, such as a school textbook

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primer²

a substance, such as paint, applied to a surface as a base, sealer, etc.

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primer [′prīm·ər]

(materials)

A prefinishing coat applied to surfaces that are to be painted or otherwise finished. Also known as prime coat.

(cell and molecular biology)

A short ribonucleic acid (RNA) sequence that is complementary to a sequence of deoxyribonucleic acid (DNA) and has a 3′-OH terminus at which a DNA polymerase begins synthesis of a DNA chain.

A short sequence of DNA that is complementary to a messenger RNA (mRNA) sequence and enables reverse transcriptase to begin copying the neighboring sequences of mRNA.

A transfer RNA whose elongation starts RNA-directed DNA synthesis in retroviruses.

(engineering)

In general, a small, sensitive initial explosive train component which on being actuated initiates functioning of the explosive train, and will not reliably initiate high explosive charge; classified according to the method of initiation, for example, percussion primer, electric primer, or friction primer.