#pistil

• Acarpellous — Completely lacking carpels (modified leaves with a feminine reproductive role that constitute the gynoecium or pistil of a flower). The term specifically describes unisexual male (staminate) flowers or sterile flowers whose anatomical structure completely lacks a female reproductive apparatus, or where it aborted in early floral bud stages.
• Androgynophore — An elongated extension of the floral axis (receptacle) in the form of a support or column that structurally supports and simultaneously elevates both the androecium (stamens) and the gynoecium (pistil) above the perianth level. This precise anatomical element is characteristic of certain species (such as the genus Passiflora), optimizing pollination efficiency.
• Apogyny — Congenital, accidental, or evolutionary loss of female reproductive capacity in plants, manifested by the atrophy, abortion, or total absence of the gynoecium or carpel organs; structural female sterility. The phenomenon is studied in phytogenetics to understand the internal hormonal modifications hindering pistil development.
• Architrave — A horizontal structural architectural element, made of stone, wood, or marble, constituting the lower part of the entablature and resting directly on the capitals of the columns or supporting pillars. In classical architectural orders (Doric, Ionic, Corinthian), the architrave has the essential role of bearing the weight of the upper structures (frieze and cornice) and distributing it evenly to the vertical support elements.