oestruate

• estruate (U.S.)
• œstruate (obsolete)

oestruate (third-person singular simple present oestruates, present participle oestruating, simple past and past participle oestruated)

1. To be in heat (state of sexual receptivity).

• “oestruate”, in The Century Dictionary […], New York, N.Y.: The Century Co., 1911, →OCLC.

• autosteer