gum-lac
Noun: An inferior type of lac, a resinous secretion, produced by lac insects (Kerria species) in Madagascar. It is a natural resin of lower quality compared to other types of lac.
"Gum-lac" is a specific, technical term used in contexts such as entomology, natural product chemistry, and historical manufacturing. It refers to a particular variety of the resin known as lac. * The varnish recipe called for gum-lac, which was historically imported from Madagascar. * Under the microscope, the structure of gum-lac differs from that of sticklac.
The term is primarily found in historical or highly specialized scientific texts describing the sources and properties of natural resins. It is not commonly used in everyday modern English.
- Lac (noun): The general term for the resinous secretion produced by lac insects. Gum-lac is one type of lac.
- Shellac (noun): A refined form of lac, processed and sold in thin flakes, used to make varnish and sealants. Gum-lac is a raw material that can be processed into shellac.
- Sticklac (noun): The raw, unprocessed lac resin that still contains insect parts and wood twigs.
- Madagascar lac (noun): A direct synonym specifying the geographic origin.
- Inferior lac (noun): A descriptive synonym highlighting its quality relative to other lacs.
This term has a single, specific meaning. It does not refer to chewing gum or any other substance. The hyphen in "gum-lac" is standard for this compound noun, distinguishing it from the general term "lac."
-
an inferior lac produced by lac insects in Madagascar
Khám phá thêm
Các từ liên quan
Từ gần giống
