The unglossed headword is the masculine accusative singular or neuter nominative/accusative singular of the rare adjective mniaro/s. (Its epic/poetic genitive singular occurs in the quotation given.) Evidently quoted from somewhere, but in fact attested only here.
The quotation is from Greek Anthology 6.250.3-4 (Antiphilus), on the poet's gifts to a lady; cf. Gow and Page vol. I (90-91); vol. II (116-117); and further extracts from this epigram at epsilon 777, epsiloniota 197, lambda 620, and nu 36.
[1] "with thick wool" in the present entry is spelled baqurrai/noio, as if from an adjective baqu/rrainos. However, LSJ (web address 1) and Paton's Loeb spell this adjective baqu/rrhnos, reading h rather than ai.
[2] Alternatively, the passage might be translated (removing Adler's comma, which is not printed in Paton): "but accept a garment, which seems like a flowery purple of a rug, mossy, with thick wool."