ATAVUS
\ˈatavəs], \ˈatavəs], \ˈa_t_a_v_ə_s]\
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The great-grandfather's or great-grandmother's grandfather; a fourth grandfather. The ascending line of lineal ancestry runs thus: Pater, Avus, Proarus, Ahavus, Atavus, Tritavus. The seventh gen eration in the ascending scale will be Tritavi- pater, and the next above It Proaviatavus.
By Henry Campbell Black
Word of the day
basidiomycota
- comprises fungi bearing the spores on basidium: Gasteromycetes (puffballs); Tiliomycetes (comprising orders Ustilaginales (smuts) and Uredinales (rusts)); Hymenomycetes (mushrooms; toadstools; agarics; bracket fungi); in some classification systems considered a division of kingdom comprises fungi bearing spores on a basidium; includes Gasteromycetes (puffballs) Tiliomycetes comprising the orders Ustilaginales (smuts) and Uredinales (rusts) Hymenomycetes (mushrooms, toadstools, agarics bracket fungi).