Meaning of QUASI- in English

QUASI-

[quasi-] comb form [L quasi as if, as it were, approximately, fr. quam as + si if--more at quantity, so] 1: in some sense or degree "quasiperiodic"

2: resembling in some degree "quasiparticle"

Merriam-Webster English vocab.      Английский словарь Merriam Webster.