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vitellogenesis
vitellogenesis n. 
/vʌɪˌtɛlə(ʊ)ˈdʒɛnᵻsɪs/, /vəˌtɛloʊˈdʒɛnəsəs/ the formation of the vitellus.
Brit. /vᵻˌtɛlə(ʊ)ˈdʒɛnᵻsɪs/
, /vᵻˌtɛlə(ʊ)ˈdʒɛnᵻsɪs//vʌɪˌtɛlə(ʊ)ˈdʒɛnᵻsɪs/U.S. /vaɪˌtɛloʊˈdʒɛnəsəs/
, /vaɪˌtɛloʊˈdʒɛnəsəs//vəˌtɛloʊˈdʒɛnəsəs/ΘΚΠ
the world > life > biology > biological processes > procreation or reproduction > reproductive substances or cells > [noun] > ovum or ootid > yolk > formation of
vitellogenesis1956
1956 Nature 11 Feb. 277/1 (table) All [honey-bee ovaries] fully regressed; no commencement of vitellogenesis.
1974 Nature 4 Jan. 72/2 Some fish are not fully regressed and have ovaries in early stages of vitellogenesis.
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