Resembling or characteristic of a porthole.

(mathematics, mnemonic) An acronym for arithmetic order of operations, with B first and AS last: Brackets, then order or 'of' in some curricula, then multiplication and division, then addition and ...

(biology) A theory of evolution, especially the scientific theory of evolution through natural selection. / (by extension) Any model of disequilibrium or accumulating change.

plural of telecentre