Usage Note
Científica is the feminine form of científico (scientist/scientific). As a noun it means a female scientist; as an adjective (investigación científica) it simply means 'scientific', with no gender implication. The seed entry records it as feminine-gender noun — a valid lexical entry highlighting the gendered noun specifically. In inclusive or mixed contexts, científico/a or los científicos is used; the Real Academia now also accepts la científica and el científico as the standard pair.
Examples
"La científica publicó sus resultados."
Natural Translation
The scientist published her results.

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