clinicus
From LSJ
ἐπ' αὐτὸν ἥκεις τὸν βατῆρα τῆς θύρας → you've come to the crux of the matter, come to the point, hit the nail on the head, you've come to the very threshold of the door, you are come to the very threshold of the door, you've arrived at the truth of the matter
Latin > English (Lewis & Short)
clīnĭcus: i, m., = κλινικός [[[κλίνη]], the bed.
I A physician who attends patients sick in bed, Mart. 9, 97; cf. MEDICVS, Inscr. Orell. 2983: deus, Prud. Apoth. 205.—
II A patient confined to his bed, Hier. Ep. 105, n. 5.—
III A bearer of the bier, sexton, grave-digger, Mart. 3, 93, 24 (al. archiclinico; cf. id. 1, 31).—
One who was baptized when sick or infirm, Cypr. Ep. 69 fin.>