1 the highest point or most successful part of something: --
2 the pointed end of an organ: --
A chest x-ray showed an abnormality in the left lung apex.
3 abbreviation for Advance Purchase Excursion: a system of cheap travel tickets that must be bought a particular number of days before travelling: --
an Apex fare
5 a train or plane ticket that is cheaper than the usual price because you buy it several days or weeks before you travel: --
One major finding of this study is that flowers situated near the apex of the inflorescence set more and larger seeds than basal flowers.
Newly opened flowers were taken from the apices of the plant and young leaves were removed from the first group below the inflorescence.
The apices could be seen as belonging to the same (middle) object, or to two different (flanking) objects.
Overhead is the old composite timber and steel truss roof, its apex bearing a continuous run of automatically opening greenhouse lights.
Distinctive thicker dark bands of greater electron density also occurred, but were distinguishable only at the apex of longitudinally sectioned spines (fig. 4).
Since most of the leaves of all species were at the apex of the stem, this did not involve burying any leaves.
The continuities can be striking, most notably at the apex of power.
The leading edge of the plate was machined to a wedge angle of 30", rounded off a t the apex.
