instrument for recording ocean waves, normally designed to register the waves produced by the wind, but in some forms of instrument (tsunameters) specifically constructed to record tsunamis, ookeanilainete salvestamise vahend, mis on ette nähtud tuule tekitatud lainete meerimiseks, kuid mõnes mõõtevahendi (tsunamomeerik) vormis ka tsunamide salvestamiseks