guaiac
Noun: 1. A hard, dense, greenish-brown wood: This refers to the timber obtained from trees of the genus Guaiacum, particularly the lignum vitae tree. It is known for its exceptional hardness, durability, and self-lubricating properties due to its high resin content. 2. A resin or medicinal substance: Historically, "guaiac" (or "guaiacum") referred to the resin extracted from these trees, which was used in medicine and for making a chemical reagent (guaiac test).
- Noun (Wood):
- The ship's propeller shaft bearings were made of guaiac because of the wood's natural lubricity.
- Due to its density, guaiac sinks in water.
- Noun (Resin/Substance):
- In the 16th century, guaiac was a popular treatment for syphilis.
- The guaiac test is used to detect the presence of blood in stool samples.
- "Guaiac test": A specific chemical test that uses guaiac resin to detect the presence of hemoglobin (blood) in fecal matter, commonly used for colorectal cancer screening.
- The doctor ordered a guaiac test as part of the routine check-up.
- Guaiacum (n): The scientific genus name for the trees that produce guaiac wood and resin. It is often used interchangeably with "guaiac" in historical and botanical contexts.
- Lignum vitae (n): A common name for trees in the genus, especially and . It literally means "wood of life" in Latin.
- Guaiacol (n): A chemical compound originally derived from guaiac resin, now used in pharmaceuticals and as a flavoring agent.
- Lignum vitae: (When referring specifically to the wood)
- Ironwood: (A general term for very hard woods; not a precise synonym but describes a similar property)
The primary modern meaning of "guaiac" relates to the physical wood and its industrial uses (e.g., bearings, mallets). The meaning related to resin and medicine is largely historical or specific to the "guaiac test" in medical diagnostics. The context usually makes the intended meaning clear.
- hard greenish-brown wood of the lignum vitae tree and other trees of the genus Guaiacum