OESTRUATION
OEs`tru*a"tion, n. (Physiol.)
Defn: The state of being under oestrual influence, or of having sexual desire.
OESTRUS
OEs"trus, n. Etym: [L., a gadfly; also, frenzy, fr.Gr.
1. (Zoöl.)
Defn: A genus of gadflies. The species which deposits its larvæ in the nasal cavities of sheep is oestrus ovis.
2. A vehement desire; esp. (Physiol.), the periodical sexual impulse of animals; heat; rut.
OF Of, prep. Etym: [AS. of of, from, off; akin to D. & OS. af, G. ab off, OHG. aba from, away, Icel., Dan., Sw., & Goth. af, L. ab, Gr. apa. Cf.Off, A- (2), Ab-, After, Epi-.]
Defn: In a general sense, from, or out from; proceeding from; belonging to; relating to; concerning; — used in a variety of applications; as:
1. Denoting that from which anything proceeds; indicating origin, source, descent, and the like; as, he is of a race of kings; he is of noble blood. That holy thing which shall be born of thee shall be called the Son of God. Luke i. 35. I have received of the Lord that which also I delivered unto you. 1 Cor. xi. 23.
2. Denoting possession or ownership, or the relation of subject to attribute; as, the apartment of the consul: the power of the king; a man of courage; the gate of heaven. "Poor of spirit." Macaulay.