Abbreviation of octal.
"The surgeon used OCT to examine the retinal layers in detail without invasive procedures."
Initialism of optical coherence tomography: an optical signal acquisition and processing method that captures high-resolution three-dimensional images from biological tissues.
In plain English: An oct is an old-fashioned unit of measurement for liquid volume that equals eight gallons.
"The computer program crashed because an oct error prevented the system from reading the file correctly."
Alternative spelling of Oct.
"The archaic manuscript spells the month as oct instead of October."
Oct is short for octal, a base-eight number system that uses only eight digits instead of ten. This term entered English as an abbreviation to distinguish it from the more common decimal system.