Meanings

sinoatrial node

sinus node

palace of a retired emperor

sinusoid

venous sinus

Soto Zen

tree hollow

void

cavity resonator

service tunnel (cables, gas, etc.)

to wait for a good opportunity

sinus arrhythmia

geode

sinus rhythm

sinoatrial

residence of a retired emperor

sick sinus syndrome

coronary sinus

cerebral venous sinus thrombosis

dural venous sinus