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resin

n. · v.
US //ˈɹɛzən// UK //ɹˈɛzɪn// resin
  1. 1 natural tree sap (n.)
    B2 Upper Intermediate Science

    a thick, sticky liquid that comes out of some trees, especially pine trees, and becomes hard over time.

    a viscous hydrocarbon secretion of many plants, particularly coniferous trees, which hardens upon exposure to air.

    Example

    The pine tree was covered in sticky resin where a branch had broken off.

    Example

    Amber is actually fossilised resin that flowed from ancient trees millions of years ago, often trapping insects inside.

    Usage

    Often used uncountably when referring to the substance generally.
  2. 2 synthetic material (n.)
    C1 Advanced Technical Technical

    a man-made substance used to create plastics, glues, and strong coatings.

    any of various solid or semi-solid organic compounds, typically manufactured through polymerisation, used as a basis for plastics and adhesives.

    Example

    She used a clear resin to coat the wooden table and give it a shiny finish.

    Example

    The manufacturer switched to a high-performance epoxy resin to ensure the carbon-fibre components would withstand extreme thermal stress.

    Usage

    Commonly used in industrial and artistic contexts.
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  1. 3 to apply resin (v.)
    C2 Proficiency Technical

    to put resin on something, often to make it less slippery or to protect it.

    to treat or coat a surface with resin. Transitive — requires a direct object.

    Example

    The violin player needed to resin her bow before the concert started.

    Example

    The technician carefully resined the electrical components to insulate them against moisture and vibration.

    Usage

    Usually appears in specific craft or musical contexts.
Origin

From Middle English resyn, resyne, from Old French résine, from Latin resīna. Doublet of rosin.

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