| strongylida | An order of nematodes of the subclass secernentea. Characteristics include an h-shaped excretory system with two subventral glands. (12 Dec 1998) |
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| strongylida infections | Infections with nematodes of the order strongylida. (12 Dec 1998) |
| Strongylidae | A family of parasitic nematode worms (order Strongyloidea) including the genera Strongylus and Oesophagostomum. Origin: see Strongyloides (05 Mar 2000) |