"initial member" is correct and usable in written English.
You can use it to refer to the first or earliest member of a group or organization. For example, "He was the initial member of the board of directors."
Each preliminary cluster is initialized by taking its representative as its initial member.
Ms. Isham is also being named as the initial member of the new worldwide strategic leadership team.
Maybank recalls the night the team (which was now up to eight employees) sent out the initial member invites on October 31, 2007.
This paper is concerned with probabilistic analysis of initial member stress in geometrically imperfect regular lattice structures with periodic boundary conditions.
Although coexistence would be the result of initial member sizes on the separate OC, this possibility is too sensitive to disturbances to be sociological meaningful.
When a vehicle reaches the communication range, the collision free path was determined by comparing the initial member of collision group and of another incoming vehicle.
Of the 15 initial members of the EU, only Greece and Portugal now have lower hourly wages.
As the will states, the trustees have appointed five people who will be the initial members of the prize committee.
He is just one of a handful of the initial members of President Barack Obama's cabinet still in office.
The 10 initial members are Abbott, AstraZeneca, Boehringer Ingelheim, Bristol-Myers Squibb, ELillylly, GlaxoSmithKline, Johnson & Johnson, Pfizer, Roche's Genentech division, and Sanofi.
Initial members included Mr. Perkins George A. Keyworth III, a former Reagan administration science adviser; Richard A. Hackborn, a former Hewlett-Packard executive; and Lawrence T. Babbio Jr., vice chairman of Verizon.
