What is the meaning of Syringa?

Sweet mock orange (Philadelphus coronarius).

Any of the several flowering plants of the genus Philadelphus, such as now in the Western United States Philadelphus lewisii.

Any of the several flowering plants, of the genus Syringa, such as the lilacs.

Alternative form of seringa

syringe

accusative singular of sȳrinx

Source: wiktionary.org