What is the definition of lipophilic?

• A. Water loving
• B. Fat loving
• C. Cell killing
• D. Cell preventing

Answer: (B)

Lipophilic refers to the property of a substance that is 'fat loving,' meaning it has an affinity for lipids or fats. Lipophilic compounds tend to dissolve in fats and oils rather than in water. This characteristic is essential in various biological and chemical processes, particularly in pharmacology, where the lipophilicity of a drug can influence its absorption, distribution, and elimination in the body. Understanding whether a compound is lipophilic or hydrophilic (water-loving) helps predict how it will behave in different environments, such as cell membranes, which are primarily composed of lipid bilayers.

The other choices relate to different properties or effects that do not apply to the meaning of lipophilic. For example, 'water loving' refers to hydrophilic substances, while 'cell killing' and 'cell preventing' pertain to actions or effects on cells rather than the solubility characteristics of compounds.