lineal
From LSJ
Δελφῖνα νήχεσθαι διδάσκεις: ἐπὶ τῶν ἐν ἐκείνοις τινὰ παιδοτριβούντων, ἐν οἷς ἤσκηται → Teaching dolphins to swim: is applied to those who are teaching something among people who are already well versed in it
English > Greek (Woodhouse)
adjective
lineal descent, use subs.: P. and V. γένος, τό.
lineal descendant: P. and V. ἔκγονος, ὁ or ἡ, P. ἀπόγονος, ὁ or ἡ; see descendant.