| Term | Definition | Applies to: |
| beak | The jointed structure or rostrum | Hemiptera |
| covering the maxilla or trophi in |
| Hemiptera |
| binomen | The combination of two names, | Classification |
| the first being the generic name |
| and the second a specific name, |
| that together constitute the |
| scientific name of a species |
| binomial nomenclature | The system of nomenclature in | Classification |
| which a species, but no taxon or |
| any other rank, is denoted by a |
| combination of two names |
| book gills | Respiratory apparatus consisting | Xiphosura (Horseshoe crab) |
| of leaflike folds |
| c., circa | About, near | Latin Abbreviations |
| calypter | One or two small lobes at base of | Diptera |
| wing, just above haltere |
| caudal | Refers to tip of abdomen, toward | General |
| the tail, posterior end of body |
| cenchrus | Pl. cenchri; minute, often white | Hymenoptera |
| marks or membranous spaces on |
| the metanotum of some |
| Hymenoptera |
| cercus | Segmented paired appendages | General |
| located at tip of abdomen (plural |
| = cerci) |
| cf., cfr., | Compare | Latin Abbreviations |
| character | Any attribute of organisms used | Classification |
| for recognizing, differentiating or |
| classifying taxa |
| cladistic classification | Classification based on 'recency | Classification |
| of common descent', i.e. |
| Categories depend on the |
| position of the branching points |
| on the inferred phylogenetic tree |
| classification | The ordering of organisms into | Classification |
| groups on the basis of their |
| relationships |
| clavate | Clublike, enlarged at tip (e.g. | General |
| clavate antennae) |
| clavus | Oblong or triangular anal portion | Hemiptera, Homoptera |
| of front wing |
| Monday, April 14, 2003 | Page 2 of 15 |