LSJ
τά (sg. v. infr. III; for the accent v. Hdn. Gr. 1.357), halfdeck at the stern of a ship, νηῶν ἴκρι’ ἐπῴχετο μακρὰ βιβάσθων Il. 15.676; [κυβερνήτης] κάππεσ’ ἀπ’ ἰκριόφιν Od. 12.414; εἰς ἴκρια νηὸς ἔβαινον πρῴρης (i.e. from the prow) ib. 229; νηὸς ἐπ’ ἰκριόφιν καταλέξεται 3.353; εὐπάκτων ἐπ’ ἰκρίων σταθεὶς ὄρουσε B. 16.83; wrongly expld. by Eust. as = ἐγκοίλια in Od. 5.252, but perh. so used by Nonn. D. 40.447, 452; expld. as = κεραία in A.R. 1.566 by Sch., but prob. wrongly, cf. Lyc. 751. generally, platform, stage, ἴκρια ἐπὶ σταυρῶν ὑψηλῶν… ἕστηκε Hdt. 5.16, cf. Str. 12.3.18, Hsch.
scaffolding, IG1². 94.28 (prob. in 374.151), 4.39 (Aegina, v BC), BCH 6.27 (Delos, ii BC).
benches in a theatre, Cratin. 323, Ar. Th. 395, Ath. 4.167f. dub.sens. in Thphr. HP 5.6.2. sg., = ἱστός, mast, Eust. 1533.31; pole, dub.l. in Nic. Th. 198; set up on a cenotaph, Marcellin. Vit. Thuc. 31.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)