serum
[C/U] Both
pl: serumspast: nullpp: nulling: nullcomp: nullsup: null
In a medical context, the term evokes a sense of clinical precision and diagnostic purity. It refers to the essence of the blood stripped of its cellular components, serving as a window into the body's internal chemical state. In the beauty industry, the word suggests potency and luxury. It implies a high concentration of active molecules designed for targeted delivery, distinguishing it from lighter lotions or heavier creams through its thin, fast-absorbing consistency.
Countable when referring to a specific commercial product (a serum). Uncountable when referring to the biological fluid in a clinical sample.