siss (iou) and unesterified free fatty acid (medicine)

siss (iou)

siss verb & noun2. Now dial. & US. ME.
[Middle Dutch cissen, Dutch, Low German sissen, of imit. origin.]
A. verb intrans. Hiss. ME.
b. noun. A hissing sound. L19.

unesterified free fatty acid (medicine)

unesterified free fatty acid
Free fatty acids which occur in plasma as a result of lipolysis in adipose tissue or when plasma triacylglycerols are taken into tissues.

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