| alidad | (noun) surveying instrument used with a plane table for drawing lines of sight on a distant object and for measuring angles | Synonyms: alidade |
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| (noun) surveying instrument consisting of the upper movable part of a theodolite including the telescope and its attachments | Synonyms: alidade |
| aoudad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, arui, audad, Barbary sheep, maned sheep |
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| audad | (noun) wild sheep of northern Africa | Synonyms: Ammotragus lervia, aoudad, arui, Barbary sheep, maned sheep |
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| crawdad | (noun) small freshwater decapod crustacean that resembles a lobster | Synonyms: crawdaddy, crawfish, crayfish |
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| (noun) tiny lobster-like crustaceans usually boiled briefly | Synonyms: crawfish, crayfish, ecrevisse |
| dad | (noun) an informal term for a father; probably derived from baby talk | Synonyms: dada, daddy, pa, papa, pappa, pop |
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| doodad | (noun) something unspecified whose name is either forgotten or not known | Synonyms: dojigger, doohickey, gimmick, gismo, gizmo, gubbins, thingamabob, thingamajig, thingmabob, thingmajig, thingumabob, thingumajig, thingummy, whatchamacallit, whatchamacallum, whatsis, widget |
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| grandad | (noun) the father of your father or mother | Synonyms: gramps, granddad, granddaddy, grandfather, grandpa |
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| granddad | (noun) the father of your father or mother | Synonyms: gramps, grandad, granddaddy, grandfather, grandpa |
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| superdad | (noun) an informal term for a father who can combine childcare and full-time employment | - |
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