noun
Etymology: pit (I)
: a membrane of a plant pit that consists of primary wall and middle lamella and that closes the pit externally — called also closing membrane ; compare torus
noun
Etymology: pit (I)
: a membrane of a plant pit that consists of primary wall and middle lamella and that closes the pit externally — called also closing membrane ; compare torus
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012