| Termen/ Term | Nr. apariții/ No. occurrences |
| COLTUNII POPII | 21 |
| COMPARATIE INTRE MEMBRELE DE OM SI MAIMUTA | 1 |
| COMPLET | 1 |
| COMPLETA | 1 |
| COPEPOD | 31 |
| COPEPOD CALANOID | 1 |
| COPEPODA | 1 |
| COPIL MONSTRU | 1 |
| COPIL NASCUT LA TERMEN | 1 |
| COPIL NASCUT PREMATUR | 1 |
| CORAL | 66 |
| CORAL ALB | 1 |
| CORAL GORGONAL | 2 |
| CORAL GORGONAR | 1 |
| CORAL SOLITAR DE ADINC | 2 |
| CORB | 17 |
| CORB AFRICAN | 1 |
| CORB ASIATIC | 1 |
| CORB DE MARE | 1 |
| CORB-DE-MARE | 2 |
| CORCODEL | 2 |
| CORCODEL GIT NEGRU | 1 |
| CORCODEL MARE | 7 |
| CORCODEL MIC | 2 |
| CORCODEL NEGRU | 2 |
| CORCODEL PITIC | 5 |
| CORCODEL URECHIAT | 1 |
| CORCODEL-CU-GIT-ROSU | 2 |
| CORDEA | 5 |
| CORDELUTA | 1 |
| CORMORAN | 1 |
| CORMORAN MARE | 2 |
| CORN | 7 |
| CORNUT | 2 |
| CORNUT DE MUNTE | 2 |
| COROANA DE SPINI | 1 |
| COROFANA | 1 |
| CORONISTE | 8 |
| CORONULA | 1 |
| CORVID ASIATIC | 1 |
| COSAC CU BOT ASCUTIT | 1 |
| COSACI | 12 |
| COSICEL | 12 |
| COSITA | 4 |
| COSTREI | 4 |
| COTINGA ALBASTRA | 2 |
| COTINGID BRAZILIAN | 1 |
| COTINGID CU GITUL GOL | 1 |
| COTINGID SUD-AMERICAN | 1 |
| COTINGID TRICARUNCULAT | 1 |