For children and youths under the ephebic age there was no practical regulation of schools or palaestra by the state.
1880 (the noun, ephebe, is attested from 1690s), from Greek ephebos "of age 18-20," from epi "upon" (see epi-) + hebe "early manhood," from PIE *yegw-a- "power, youth, strength." In classical Athens, a youth of 18 underwent his dokimasia, had his hair cut off, and was enrolled as a citizen. His chief occupation for the next two years was garrison duty.
ephebic e·phe·bic (ĭ-fē'bĭk)
Of or relating to the period of puberty or adolescence.