Hebrew and Greek Strong's Dictionary with all the definitions plus combined with every place that word is used in the definitions.
Complete index of every word used in both the Hebrew and Greek Strong's Dictionary in English Word order.
Hebrew and Greek Expanded Dictionary
birds 2201 - zeugos {dzyoo'-gos}; from the same as 2218; a couple, i.e. a team (of oxen yoked together) or brace (of {birds} tied together): -- yoke, pair.