This is the 7597th most frequent Portuguese word.
oz
"Oz" is not a Portuguese word; it may refer to "Oz" in English, meaning "a fictional land" or "short for ounce."
The word ozônio here refers to the ozone as a chemical substance in scientific terms.
Na tabela periódica, o elemento químico ozônio é representado pelo símbolo 'O₃'.
In the periodic table, the chemical element ozone is represented by the symbol 'O₃'.
The word 'os' here is part of the definite article 'os' meaning 'the' in plural masculine, providing specificity to the noun 'filhotes'.
Os filhotes estavam brincando próximos da cerca, mas o quintal não tinha perigo.
The puppies were playing near the fence, but the yard was not dangerous.
The word 'do' here combines 'de' (of/from) and 'o' (the), forming a contraction that indicates possession or relationship with 'horizonte'.