defecar

The clinical/formal verb for defecating — used in medical and veterinary contexts, or whenever a more delicate register than common crude alternatives is wanted (el paciente no ha defecado en tres días). It's a normal, non-vulgar word, just a bodily-function term you'd expect in a doctor's office rather than casual conversation.

• El médico preguntó si el bebé había defecado con normalidad. — The doctor asked if the baby had had normal bowel movements.
• El perro no ha defecado en todo el día. — The dog hasn't defecated all day.
• Es importante defecar con regularidad para una buena digestión. — It's important to have regular bowel movements for good digestion.

Defecar is clinical, not vulgar — learners sometimes avoid it thinking it's crude, when it's actually the polite, medical-register choice compared to common slang alternatives.