Quarterly Update 16, Spring 2019
| Headword | Part of Speech | Update Type |
| alligator | n1 | Revised Sense |
| callithump | n | New Entry |
| callithump | v | New Entry |
| callithumpian | adj, n | New Senses, Revised Senses |
| conger eel | n | New Sense |
| congo eel | n | Revised Sense |
| congo snake | n | Revised Entry |
| eel fly | n | Revised Entry |
| evet | n | Revised Entry |
| ground dog | n | New Entry |
| ground puppy | n | Revised Entry |
| lamp eel | n | Revised Sense, New Senses |
| lamper eel | n | Revised Sense |
| lamprey eel | n | Revised Sense, New Sense |
| lampus eel | n 1 | New Entry |