ambassador. 1  a diplomatic official of the highest rank, sent by one sovereign or state to another as its resident representative (ambassador extraordinary and plenipotentiary) 2  a diplomatic official of the highest rank sent by a government to represent it on a temporary mission, as for negotiating a treaty.
A bacteriostatic is a compound which has the effect of preventing bacterial growth. These agents do not kill bacteria like bactericidal compounds; instead, they limit further replication of bacteria at the site where they are introduced. Several antibiotic drugs are bacteriostatic agents, with tetracyclines being a notable example.
To abandon development of a structure or organ. abscission. shedding of an organ that is mature or aged, e.g. a ripe fruit or an old leaf. abscission zone. a specialised layer of tissue formed, for example, at the base of a petiole or pedicel that allows the organ to be shed by abscission when it is ripe or senescent.